Thursday, May 29, 2008

Missing info in GAMS listing file

I would highly prefer that the listing file is self-contained. In many cases solvers stop without issuing proper messages to the listing file. Here is an example with PATHNLP:

               S O L V E      S U M M A R Y
 
MODEL TIME OBJECTIVE LL
TYPE NLP DIRECTION MAXIMIZE
SOLVER PATHNLP FROM LINE 160
 
**** SOLVER STATUS 4 TERMINATED BY SOLVER
**** MODEL STATUS 7 INTERMEDIATE NONOPTIMAL
**** OBJECTIVE VALUE 47.2365
 
RESOURCE USAGE, LIMIT 35.697 1000.000
ITERATION COUNT, LIMIT 0 100000
EVALUATION ERRORS 0 0
 
PATH-NLP May 1, 2008 22.7.2 WEX 3906.4799 WEI x86_64/MS Windows
 
NLP size: 829 rows, 881 cols, 10145 non-zeros, 1.39% dense.
MCP size: 1708 rows/cols, 26626 non-zeros, 0.91% dense.


There is no indication why PATHNLP stopped.