Poor feedback from solver

Here is an example where a global solver fails.  This is actually a run on NEOS. That something goes wrong we have to accept: that can happen. However the feedback is rather poor. As a modeler I have no clue what to do now.

I think that software should be be built in a much more defensive style. Good feedback especially when something is going wrong is underappreciated by many developers.

Note: this may be a NEOS related problem, I don’t know at this stage.

S O L V E S U M M A R Y MODEL ds OBJECTIVE w TYPE QCP DIRECTION MAXIMIZE SOLVER LINDOGLOBAL FROM LINE 35 **** SOLVER STATUS 13 System Failure **** MODEL STATUS 13 Error No Solution **** OBJECTIVE VALUE NA RESOURCE USAGE, LIMIT NA 1000.000 ITERATION COUNT, LIMIT NA 2000000000 EVALUATION ERRORS NA 0 LINDOGLOBAL Jul 14, 2011 23.7.3 LEX 27723.27726 LEG x86_64/Linux LINDOGLOBAL Driver Lindo Systems Inc, www.lindo.com Lindo API version 6.1.1.588 built on Jun 29 2011 22:29:58 No solution returned GAMS Rev 237 LEX-LEG 23.7.3 x86_64/Linux 08/01/12 06:01:26 Page 4 G e n e r a l A l g e b r a i c M o d e l i n g S y s t e m Solution Report SOLVE ds Using QCP From line 35 **** SOLVER STATUS FILE LISTED BELOW =C =CLINDOGLOBAL Jul 14, 2011 23.7.3 LEX 27723.27726 LEG x86_64/Linux =0LINDOGLOBAL Jul 14, 2011 23.7.3 LEX 27723.27726 LEG x86_64/Linux =C =C LINDOGLOBAL Driver =C Lindo Systems Inc, www.lindo.com =C =CLindo API version 6.1.1.588 built on Jun 29 2011 22:29:58 Barrier Solver Version 6.0.0.114, Nonlinear Solver Version 3.15A Platform Linux x64 Number of constraints: 102 le: 0, ge: 0, eq: 102, rn: 0 (ne:0) Number of variables : 42 lb: 0, ub: 0, fr: 42, bx: 0 (fx:0) Number of nonzeroes : 1083 density=0.0025(%) Nonlinear variables : 42 Nonlinear constraints: 61 Nonlinear nonzeroes : 982+0 Starting global optimization ... Number of nonlinear functions/operators: 1 EP_MULTIPLY Starting GOP presolve ... Pre-check unboundedness **** SOLVER STATUS FILE LISTED ABOVE

Update: there seems to be a bug involved. Just for a fraction of second or so I saw a message:

Error: *** glibc detected *** /opt/gams/latest/gmsgenux.out: double free or corruption (out): 0x0000000009286c20 ***

It is noted that this is not the latest GAMS version, which is 23.9.