[Coin-discuss] Problem that cbc aborts on

[Kim Hansen]

Hi,

I have found a problem that cbc aborts on without telling me much about why.

I have created a ticket in the trac: https://projects.coin-or.org/Cbc/ticket/19

The output when trying to solve it with cbc is:
=========================
Model was imported from ./aborts-2007-03-16.mps in 0.007999 seconds
Optimal - objective value 33555.1
Cgl0006I 1 SOS (32 members out of 506) with 0 overlaps - too much
overlap or too many others
Cgl0003I 1 fixed, 25 tightened bounds, 0 strengthened rows, 0 substitutions
Cgl0003I 1 fixed, 0 tightened bounds, 0 strengthened rows, 0 substitutions
Cgl0004I processed model has 208 rows, 123 columns (123 integer) and
870 elements
processed model has 208 rows, 123 columns and 870 elements
Optimal - objective value 33555.1
123 integer variables
Cbc0009I Objective coefficients multiple of 1
cutoff increment increased from 1e-05 to 0.999
 Aborted
=========================

I have just found out that cbc-generic can solve it:
=========================
Cbc0001I Search completed - best objective 133420, took 101 iterations
and 0 nodes (0.05 seconds)
Result 133420 iterations 101 nodes 0 took 0.111983 seconds - total 0.120982
=========================

Regards,
-- 
Kim Hansen
Vadgårdsvej 3, 2.tv
2860 Søborg
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