SECTION D.
ERROR CODES
IER CONOPT SEQOPT GRADX DFP POWELL NMSIMP PATERN RNSRCH MUKAI
- 1 ITERL ITERL ITERL ITERL ITERL ITERL ITERL
- 2 FP,SP FP FP
- 3 INPUT INPUT INPUT INPUT INPUT INPUT INPUT
- 4 SCRATCH SCRATCH SCRATCH SCRATCH SCRATCH SCRATCH SCRATCH
- 5 STRAY STRAY
- 6 R31
- 7 BACKTRCK
- 8 EIGENVAL
- 9 FUNC FUNC FUNC FUNC FUNC FUNC FUNC
-10 RESTART
-11 SIMPLEX
-12 SIMPLEX
-13 STOPCRI STOPCRI STOPCRI STOPCRI STOPCRI STOPCRI
-14 H-MAT
-15 STOPCRI
-16 GRAD'NT
-17 PERM
-18 PERM
-19 ITERLG
-20 ITERL3
-21 STOPCRI
-22 NP1
-23 NP
-24 GRAD'NT
-34 NC1,NC2
-35 ITERLG
-36 FUNC
-37 CONSTR
-42 LIN.SRCH
***** ERROR CODES CONTINUED *****
PROBIT TOBIT LOGIT SSVM REGFAL NEWRAP INTEG UTILITY SIMEQ
-1 ITERL ITERL
-2 SINGUL
-3 INPUT INPUT INPUT INPUT INPUT
-4 SCRATCH
-9 FUNC
-38 MORE THAN 1 SELECTED
-39 LIN.SRCH
-40 FUNC
-41 PQ,DEN
-50 to -64 INPUT
-65 PRMCHK
-66 JACOB JACOB
-67 SINGULR COVAR
-68 EQ.ERROR
-69 DIVERGE
-70 SIMEQ2
-71 COVAR
-72 AUTOCOR
***** ERROR CODES CONTINUED *****
REGRES GLOB1 GLOB2 CONTING ROMB GENALG MONCARL NORMPRB GAUSSEID
-1 ITERL ITERL
-3 INPUT INPUT INPUT INPUT
-5 STRAY
-7 BAD A&B
-10 FUNC
-67 SINGUL COVAR COVAR
-69 DIVERGE
-73 COVAR
-74 Y-VAR
-80 FUNC
-81 FUNC
-82 FUNC
-83 FUNC
-84 FUNC
-85 FUNC
-86 BOUNDS
-99 INTERNL FUNC
-100 EXP.FRQ. ITERL
-101 EXP.FRQ.
-102 FISHER
-103 EXP.FRQ.
-104 NO CONV.
***** ERROR CODES CONTINUED *****
GENRAN
-3 INPUT
-5 STRAY
DETAILED ERROR MESSAGES
A AND B DO NOT BRACKET SOLUTION
Occurrence: NORMPRB
Meaning: The function values at the extreme points of
the initial search region have the same sign
Remedy: Increase the initial search region
A MUST BE POSITIVE---QUITTING
Occurrence: RANDVAR
Meaning: The A specified for the exponential density
is nonpositive
Remedy: Correct the input
A AND B MUST BE POSITIVE
Occurrence: RANDVAR
Meaning: The A or the B specified for the Pareto was
nonpositive
Remedy: Correct the input
ASYMPTOTIC VARIANCES ARE NOT ALL POSITIVE--ERROR IN T-RATIOS
Occurrence: GRADX,DFP
Meaning: Obvious
Remedy: Refine location of optimum. Compute derivatives
analytically. Failing that, change values of FDFRAC
and FDMIN by factors of 10 upwards or downwards.
AX >= BX---QUITTING
Occurrence: BIVAR3
Meaning: Obvious
Remedy: Obvious
BACKTRACK CYCLE EXCEEDED
Occurrence: GRADX
Meaning: An apparent saddlepoint with repeated step-size shrink-
ages unable to find an improvement. Often an optimum
and mistakenly diagnosed as a saddlepoint due to in-
accurate derivatives.
Remedy: Use analytic derivatives. Failing that, alter FDFRAC
and FDMIN by factors of 10 upwards and downwards.
BHHH PROCEDURE VALID ONLY FOR LIKELIHOOD MAXIMIXATION --- NBHHH RESET
TO ZERO
Occurrence: GRADX
Meaning: The user asked for the BHHH procedure in a minimization
problem.
Remedy: GRADX automatically resets NBHHH and no further action is
necessary.
CONSTRAINED OPTIMIZATION TERMINATED
Occurrence: CONOPT
Meaning: optimization encountered an error termination (other than
exceeding the iteration limit)
Remedy: Analyze why optimization failed
CONSTRAINT ERROR AFTER CONOPT PASS
Occurrence: CONOPT
Meaning: After normal return is made from optimization, the
constraints are evaluated. This evaluation failed.
Remedy: Should not happen normally.
CONSTRAINT ERROR AT END OF CONSTRAINED OPTIMIZATION
Occurrence: CONOPT
Meaning: After CONOPT termination (normal or abnormal) a con-
straint could not be evaluated
Remedy: Should not happen with a normal termination. With ab-
normal termination analyze cause of CONOPT failure.
CONTINUAL STRAYING INTO FORBIDDEN REGION
Occurrence: GRADX,MUKAI,GENALG
Meaning: Repeated attempts are made to take a step into a region where
the function is undefined
Remedy: Attempt optimization from alternative starting points
or in GENALG vary the run-time parameters
COVARIANCE DET <= 0
Occurrence: SIMEQ
Meaning: The determinant of the sample covariance matrix is
nonpositive
Remedy: Check the data. Possibly use a new starting point.
COVARIANCE MATRIC IS NOT POSITIVE DEFINITE
Occurrence: REGR
Meaning: Sigma-squared times X'X has some nonpositive elements
Remedy: Check the data in X
COVARIANCE MATRIC NOT POSITIVE DEFINITE
Occurrence: NORMPRB
Meaning: A bad covariance matrix was specified
Remedy: Correct the input
COVARIANCE MATRIC IS NOT POSITIVE DEFINITE
Occurrence: MONCARL
Meaning: A bad covariance matrix was specified
Remedy: Correct the input
COVARIANCE MATRIX SINGULAR
Occurrence: SIMEQ
Meaning: The sample covariance matrix could not be inverted
Remedy: Check the data. Possibly use a new starting point.
Check SIMUL2. Possibly use another matrix inversion
routine.
DELX <= 0---QUITTING
Occurrence: BIVAR3
Meaning: Obvious
Remedy: Obvious
DIVERGING---PROGRAM TERMINATED
Occurrence: GAUSSEID
Meaning: Obvious
Remedy: Try rewriting equations so that equ. 1 does not
have x1 on the left hand side, etc.
EIGENVALUES DID NOT CONVERGE
Occurrence: GRADX
Meaning: Obvious
Remedy: Increase values of variables in COMMON/BPREC/RSMALL,ABSMAL
EIGENVALUES NOT ALL POSITIVE
Occurrence: NORMPRB
Meaning: A bad covariance matrix was specified
Remedy: Correct the input
ERROR IN EVALUATING EQUATIONS
Occurrence: NEWRAP
Meaning: An error occurred in evaluating G(X) in the Newton
Raphson algorithm
Remedy: Choose a different starting point or change IVFLIM,
INVLIM, EPCOR
ERROR IN FINDING JACOBIAN
Occurrence: NEWRAP
Meaning: Error occurred in finding the Jacobian
Remedy: Alter the values in COMMON/BFIDIF/FDFRAC,FDMIN
or try a new starting point.
ERROR IN FUNCTION CLARK:COVARIANCE MATRIX NOT POSITIVE DEFINITE. CLARK=
-999.0
Occurrence: CLARK2
Meaning: The correlation R12 is greater than 1.0 in absolute value
Remedy: Correct the input value for R12
ERROR IN FUNCTION DUTT2: COVARIANCE MATRIX NOT POSITIVE DEFINITE.DUTT2=
-999.0
Occurrence: DUTT2
Meaning: The correlation R12 is greater than 1.0 in absolute value
Remedy: Correct the input value for R12
ERROR IN K1 or K2 or NP...EXECUTION TERMINATED
Occurrence: DISEQ1, DISEQ3
Meaning: K1+K2+2 must be .GE. NP
Remedy: Check input parameters
ERROR IN SIMPLEX SHRINKAGE
Occurrence: NMSIMP
Meaning: Function error occurred in simplex shrinkage
Remedy: Attempt optimization from alternative starting points.
ERROR RETURN FROM SIMUL2
Occurrence: SIMEQ
Meaning: An error condition was detected in computing the
residuals and a RETURN 1 was executed
Remedy: Check data. Possibly try a new starting point.
EXCESSIVE R31 LOOPS
Occurrence: GRADX
Meaning: The quadratic approximation to the function indicates
deterioration,despite repeated shortening of the step-
size.
Remedy: Use analytic derivatives. Failing that, alter FDFRAC
and FDMIN by factors of 10 upwards and downwards.
EXPAND INVALID--RESET TO 0.1
Occurrence: GENALG
Meaning: EXPAND was not strictly between 0 and 1; it has
been automatically reset to 0.1
Remedy: If you do not like 0.1, correct input error
FAILURE OF GQOPT--T-RATIOS OR H MATRIX MAY BE UNRELIABLE
Occurrence: GRADX,DFP
Meaning: Optimization failed
Remedy: Analyze causes of failure.
FUNCTION CANNOT BE EVALUATED AT POINT PASSED
Occurrence: GLOB1
Meaning: The point passed to GLOB1 causes a FUNC error
Remedy: Change the point passed to GLOB1
FUNCTION ERROR AFTER CONOPT PASS
Occurrence: CONOPT
Meaning: After normal return is made from optimization,the
function is evaluated. This evaluation failed.
Remedy: Should not happen normally.
FUNCTION ERROR AFTER ILOOP SHRINKAGES
Occurrence: SSVM
Meaning: The proposed step results in function errors after
repeated shrinkages of the step size.
Remedy: Use different starting points are change algorithms.
FUNCTION ERROR AFTER RESETTING H-MATRIX
Occurrence: SSVM
Meaning: If shrinkages do not help, SSVM resets the H-matrix
and thus tries a different direction. This attempt
has failed.
Remedy: Change starting points or algorithms.
FUNCTION ERROR AT END OF CONSTRAINED OPTIMIZATION
Occurrence: CONOPT
Meaning: After CONOPT termination (normal or abnormal) the
function could not be evaluated
Remedy: Should not happen with normal termination. With abnormal
termination analyze cause of CONOPT failure.
FUNCTION ERROR IN FIRST FUNC CALL
Occurrence: GRADX, DFP, POWELL,NMSIMP,PATERN,RNSRCH,MUKAI,SSVM
Meaning: The very first call to FUNC resulted in an error return
Remedy: Attempt optimization from alternative starting points.
FUNCTION ERROR IN FIRST CALL OF FUNC IN SEQOPT
Occurrence: SEQOPT
Meaning: The very first call to FUNC caused an error return.
Remedy: Attempt optimization from alternative starting points.
FUNCTION ERROR IN NIPOP GENERATION
Occurrence: GENALG
Meaning: Some function evaluations in generating the
initial population failed.
Remedy: Check the function subroutine
FUNCTION ERROR IN FP OR SP
Occurrence: GRADX,DFP,SSVM
Meaning: The attempt to evaluate derivatives resulted in an
error return -- must be on or near the boundary of
the search space.
Remedy: Attempt optimization from alternative starting points.
If using numerically evaluated derivatives, replace
them with analytic derivatives.
FUNCTION ERROR IN SEARCH
Occurrence: GLOB1
Meaning: A FUNC error occurred in the search
Remedy: Change the bounds of the search region
FUNCTION ERROR ON FIRST CALL
Occurrence: GLOB2
Meaning: The first call to FUNC caused a function error
Remedy: Change the point passed to GLOB2
GRADIENT INACCURATE---DOES NOT POINT UPHILL
Occurrence: MUKAI
Meaning: After repeated shrinkages of step, the function does
not improve in the direction of the gradient
Remedy: Use analytic derivatives.
HIGH ORDER COEFFICIENT IS ZERO
Occurrence: PROOTS
Meaning: You are trying to find the roots of an nth order
polynomial, but the coefficient of x**n is zero
Remedy: Check you data
IF ONLY 2 CATEGORIES, USE PROBIT
Occurrence: POLYCHO
Meaning: For polychotomous response you should have at least
3 categories
Remedy: Check input or use probit
ILLEGAL INPUT FOR ALPH1 OR BET1
Occurrence: GENALG
Meaning: Must have 0<BET1<1 and 0<ALPH1<=1
Remedy: Fix input error
ILLEGAL INPUT FOR NP,NIPOP,NGOOD,NC, OR INITGEN
Occurrence: GENALG
Meaning: NP<=1 or NIPOP<=1 or NGOOD<=1 or NC<1 or
INITGEN<1 or INITGEN>4
Remedy: Correct input
ILLEGAL INPUT FOR NP,NIPOP,NGOOD
Occurrence: GENALG
Meaning: NIPOP must be > NPOP + NGOOD and NPOP must be
> NGOOD
Remedy: Fix input error
ILLEGAL INPUT FOR XL OR XH
Occurrence: GENALG
Meaning: An XL value is >= than the corresponding XH value
Remedy: Fix input error
ILLEGAL INPUT PARAMETERS TO OPTMOV
Occurrence: OPTMOV
Meaning: N must be between 0 and 7 and NSIZE must be positive
Remedy: Fix value of N or NSIZE.
ILLEGAL MUTATION RATE
Occurrrence: GENALG
Meaning: XMUTE must be <=0 and <=0.5
Remedy: Fix input error
ILLEGAL N-VALUE
Occurrence: SHPWLK, TAUK
Meaning: N<2 or N>50 for SHPWLK or N<3 or N>2000 for
TAUK
Remedy: Reset N
INITIAL SIMPLEX COULD NOT BE BUILT WITH 10 REDUCTIONS OF STEP SIZE
Occurrence: NMSIMP
Meaning: Function errors occurred in attempt to construct
initial simplex
Remedy: Attempt optimization from alternative starting points.
INPUT ERROR
Occurrence: NORMPRB, GENRAN
Meaning: ANSL is >= ANSH or NDIM > 20
Remedy: Correct the input
INPUT ERROR---CHECK EPCOR,ACC,ITERL,EPSVRT,IVFLIM,INVLIM
Occurrence: Numerous routines
Meaning: Invalid parameter(s) passed
Remedy: Correct erroneous parameter(s)
INSUFFICIENT DEGREES OF FREEDOM
Occurrence: ARMAPQ
Meaning: IQ+IP+1 is >= IT-IP
Remedy: Check data input
INSUFFICIENT STORAGE FOR T-RATIO. REQUEST IGNORED
Occurrence: GRADX,DFP,SSVM
Meaning: T-ratios require an extra NP*NP locations in the AINT
array
Remedy: Increase dimension of AINT and value of NQ.
INVALID H MATRIX INPUT
Occurrence: DFP
Meaning: The attempt to read in a previously saved H matrix failed
because the NP value in the previous and current runs are
not identical
Remedy: Check input file and current setting of NP.
INVALID ITERLG
Occurrence: CONOPT
Meaning: ITERLG is nonpositive
Remedy: Correct the value of ITERLG.
INVALID NC1 OR NC2
Occurrence: CONOPT
Meaning: NC1 or NC2 is nonpositive
Remedy: Correct the value of NC1 or NC2.
INVALID NP1 IN SEQOPT
Occurrence: SEQOPT
Meaning: NP1 is less than or equal to 0
Remedy: Reset NP1.
INVALID PERMUTATION IN FIRST OPTIMIZATION
Occurrence: SEQOPT
Meaning: The permutation given to SEQOPT for selecting the
first subset of variables is invalid
Remedy: Check the IPERM array.
INVALID PERMUTATION IN SECOND OPTIMIZATION
Occurrence: SEQOPT
Meaning: The permutation in the second optimization is
invalid. This is impossible if there was no
error in the permutation for the first optimiza-
tion. Program must have been overwritten.
Remedy: Check user's program.
IP AND IQ ARE BOTH = 0---USE REGR
Occurrence: ARMAPQ
Meaning: There is neither a moving average nor a autoregressive
part
Remedy: Use ordinary regression
ITERATION LIMIT EXCEEDED
Occurrence: GRADX,DFP,POWELL,NMSIMP,PATERN,RNSRCH,MUKAI,SSVM,
GENALG,GAUSSEID
Meaning: Obvious
Remedy: Reset ITERL
ITERATION LIMIT FOR SEQUENTIAL OPTIMIZATION EXCEEDED
Occurrence: SEQOPT
Meaning: The number of switches in optimization between the two
subsets of variables exceeded ITERL3
Remedy: Reset ITERL3
ITERL3 IS .LE. 0. NO OPTIMIZATION IS DONE
Occurrence: SEQOPT
Meaning: Obvious
Remedy: Set ITERL3 greater than 0.
JACOBIAN IS SINGULAR
Occurrence: NEWRAP
Meaning: Obvious
Remedy: Change the values in COMMON/BFIFIF/FDFRAC,FDMIN
JACOBIAN SINGULAR
Occurrence: SIMEQ
Meaning: Obvious
Remedy: Check the IQQ1 array in a linear system. Possibly
use a new starting point.
K1+K2+2 MUST BE .GE. NP...EXECUTION TERMINATED
Occurrence: DISEFP,DISESP
Meaning: Obvious
Remedy: Check input parameters
K1+K2+K3+3 MUST EQUAL NP...EXECUTION TERMINATED
Occurrence: DISEQ2
Meaning: Obvious
Remedy: Check input parameters
K1, K2, K3 MUST BE .GE. 1
Occurrence: DISEQ2
Meaning: Obvious
Remedy: Check input parameters
LINESEARCH FAILURE
Occurrence: SSVM, GRADX
Meaning: Function error occurred in the linesearch algorithm
Remedy: Change the values of SHRIP1 and/or SHRIP2
MATRIX APPEARS TO BE SINGULAR
Occurrence: GAJORE
Meaning: Matrix is singular or ill conditioned
Remedy: Check inpout or use a different algorithm
MATRIX X'X IS SINGULAR
Occurrence: REGR
Meaning: The X'X matrix could not be inverted
Remedy: Check the data in X
NEGATIVE VARIANCE IN TOBIT
Occurrence: ENSCRM
Meaning: User has initialized the variance to a negative
number
Remedy: Initialize variance to a positive number
NO FEASIBLE SOLUTION EXISTS
Occurrence: LINPROFS
Meaning: LINPROFS has determined that your problem has no
feasible solution
Remedy: Examine the specification of your problem
NO FEASIBLE SOLUTION FOUND
Occurrence: LINPROA
Meaning: The problem to be solved requires a b vector
that is nonnegative, and you provided a b-vector
with some negative element(s).
Remedy: Examine the specification of your problem
NO STOPPING CRITERION ENABLED FOR GQOPT--NO OPTIMIZATION DONE
Occurrence: GRADX,DFP,POWELL,NMSIMP,PATERN,RNSRCH,MUKAI,SSVM
Meaning: All relevant ISTOP( ) elements are set to 1
Remedy: Reset ISTOP( ) to zero.
NO STOPPING CRITERION ENABLED FOR NEWRAP--EXECUTION TERMINATED
Occurrence: NEWRAP
Meaning: Both ISTOP(1) and ISTOP(2) have been set = 1
Remedy: Reset ISTOP( ) to zero.
NO STOPPING CRITERION ENABLED FOR RNSRCH--NO OPTIMIZATION DONE
Occurrence: RNSRCH
Meaning: ISTOP(1) and ISTOP(3) are both set equal to 1. (ISTOP(2)
is irrelevant for RNSRCH)
Remedy: Reset at least one of the ISTOP( ) elements to zero.
NO STOPPING CRITERION ENABLED FOR SEQOPT
Occurrence: SEQOPT
Meaning: JSTOP(1) and JSTOP(2) are both 1
Remedy: Reset at least one JSTOP( ) to zero.
NOT ENOUGH SCRATCH STORAGE
Occurrence: CONOPT,GRADX,DFP,POWELL,NMSIMP,PATERN,RNSRCH,MUKAI,
SSVM
Meaning: Working array AINT and NQ are too small
Remedy: Increase DIMENSION of AINT and value of NQ.
NP IS NOT EQUAL TO K+NCAT-1
Occurrence: POLYCHO
Meaning: The number of parameters in a polychotomous response
model must equal the number of beta coefficients +
the number of categories - 1
Remedy: Fix the data input
NP MUST NOT EXCEED 200...EXECUTION TERMINATED
Occurrence: DISEFP,DISESP
Meaning: Obvious
Remedy: Check input parameters
NPT IS NOT EVEN---QUITTING
Occurrence: BIVAR3
Meaning: Obvious
Remedy: Obvious
NUMBER OF PERMISSIBLE RESTARTS EXCEEDED
Occurrence: NMSIMP
Meaning: Stopping criterion satisfied, yet final optimality
check fails after NRST restarts.
Remedy: In COMMON/BNEL/STP1,VAR,CONVGE,NRST reset NRST.
Also attempt optimization from alternative starting
points.
OPTIMAL POINT FOUND; BUT MATRIX H IS NOT CORRECT
Occurrence: GRADX
Meaning: An apparent optimum, but eigenvalue computation did not
converge
Remedy: Increase value of variables in COMMON/BPREC/RSMALL,ABSMAL
OPTMOV ARRAY X NOT AVAILABLE
Occurrence: GRADX,DFP,POWELL,NMSIMP,SSVM
Meaning: OPTMOV was asked to deliver an array not compatible
with the optimization algorithm used
Remedy: Check HANDBOOK for what arrays are available.
PERSISTENT FUNCTION ERRORS
Occurrence: GENRAN
Meaning: The algorithm is straying into a forbidden region
Remedy: Change XL and/or XH
PERSISTENT FUNCTION ERROR ON FIRST FUNCTION EVALUATION
Occurrence: GLOB1
Meaning: The first FUNC evaluation causes a FUNC error
Remedy: Change bounds of evaluation region
PERSISTENT FUNCTION ERROR ON SECOND FUNCTION EVALUATION
Occurrence: GLOB1
Meaning: The second FUNC evaluation caused a FUNC error
Remedy: Change bounds of evaluation region
PERSISTENT FUNCTION ERRORS -- MAY WISH TO RESET IERCTL
Occurrence: GLOB2
Meaning: FUNC errors are consistently encountered
Remedy: Reset bounds of search area
PRMCHK ERROR IN SMLCLN
Occurrence: SMLCLN (SIMEQ)
Meaning: An invalid variable permutation was given to SMLCLN
Remedy: Correct the permuation
PQ,DEN1 OR DEN2 ERROR
Occurrence: SSVM
Meaning: (a) The change in the gradient is orthogonal
to the proposed step (PQ)
(b) The H-matrix is not positive definite (for
minimization) (DEN1)
(c) The change in the gradient is conjugate
with the step relative to the H-matrix.
Remedy: Replace numerical derivatives with analytic ones.
Alternatively, decompose problem and use SEQOPT.
RANK ASSIGNMENT FAILURE
Occurrence: SPEAR1
Meaning: A test on the sum of the ranks has failed
Remedy: Check your assignment of ranks to the raw data
REGR REQUIRES K.LE.30
Occurrence: REGR
Meaning: The number of independent variables exceeds 30
Remedy: Either reduce the number of independent variables or
redimension SUBROUTINES REGR and GJR and recompile.
REINVERSION FAILED
Occurrence: LINPROA
Meaning: Attempt to invert the array of coefficients
for the nonbasic variables failed
Remedy: None
SCREENING OF INPUT PARAMETERS HAS DISCOVERED ERRORS
Occurrence: SIMEQ (SMLCLN)
Meaning: IQQ1 or IQQ2 or IG or NBEG or NEND are set erroneously
(see IER numbers in HANDBOOK, Section 14)
Remedy: Correct the erroneous input data
SEQOPT NOT PERMITTED IF NP EXCEEDS 200
Occurrence: SEQOPT
Meaning: NP is too large
Remedy: Increase dimensions of arrays SS1 and SS2 in SEQOPP
and statement IF(NP.LE.200) GOTO 1.
SIG MUST BE POSITIVE
Occurrence: RANDVAR
Meaning: SIG specified for the Cauchy or Rayleigh densities
was nonpositive
Remedy: Correct the input
SMALL GRADIENT WITHOUT MEETING TERMINATION CRITERIA
Occurrence: MUKAI
Meaning: The norm of the gradient is less than RSMALL (default=
1.D-14) but gradient stopping criterion is inhibited
Remedy: Set ISTOP(2)=0.
SOLUTION UNBOUNDED
Occurrence: LINPROA and LINPROFS
Meaning: The linear programming problem is unbounded
Remedy: Examine the specification of the problem
SOME ROOTS ARE INSIDE UNIT CIRCLE
Occurrence: ARMAPQ
Meaning: The moving average part has roots inside the unit
circle
Remedy: Check data input or respecify model or inhibit
root calculation
STARTING VALUE OF X IS OUT OF BOUNDS (LB AND UB)
GLOB2 IS QUITTING. RESPECIFY X SO THAT LB(I).LT.X(I).LTUB(I)
Occurrence: GLOB2
Meaning: Starting point is out of bounds
Remedy: Respecify starting point
TOBIT MAY NOT BE SELECTED WITH PROBIT OR LOGIT
Occurrence: PROBIT,TOBIT,LOGIT
Meaning: User has set IPROB=1 or 2 and ITOB=1, requesting that
tobit and either probit or logit both be computed.
Remedy: Set one of these variables=0.
SEQOPT NOT PERMITTED IF NP EXCEEDS 200
Occurrence: SEQOPT
Meaning: NP is too large
Remedy: Increase dimensions of arrays SS1 and SS2 in SEQOPP
and statement IF(NP.LE.200) GOTO 1.
SHRINK INVALID--reset to 0.9
Occurrence: GENALG
Meaning: SHRINK must be strictly between 0 and 1; it has
been automaticall reset to 0.9
Remedy: If you do not like 0.9. fix input error
SMALL GRADIENT WITHOUT MEETING TERMINATION CRITERIA
Occurrence: MUKAI
Meaning: The norm of the gradient is less than RSMALL (default=
1.D-14) but gradient stopping criterion is inhibited
Remedy: Set ISTOP(2)=0.
T-RATIO IS VALID ONLY FOR SUCCESSFUL GRADX AND DFP OPTIMIZATIONS.
REQUEST IGNORED
Occurrence: POWELL,NMSIMP,PATERN,RNSRCH,MUKAI
Meaning: T-ratios are computed only after GRADX or DFP
Remedy: Either use GRADX or DFP, or compute second derivative
matrix by calling DERIV and computing t-ratios your-
self.
T-RATIO REQUESTED FOR MAXIMIZATION WITH NOBS NOT ZERO
Occurrence: GRADX,DFP
Meaning: When NOBS is not zero, it is assumed that a sum-of-squares
minimization problem is at hand
Remedy: Reset NOBS or check if MX is correctly set.
VALUE of IHOWMAN TOO HIGH
Occurrence: GENALG
Meaning: IHOWMAN must be less than or equal to 9
Remedy: Correct the input
VARIANCE IS ZERO
Occurrence: AUTOCOV
Meaning: The time series is a constant
Remedy: Check data input
Y IS CONSTANT
Occurrence: REGR
Meaning: The dependent variables is a constant
Remedy: Check the dependent variable
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