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 x_{1}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