Opened 4 years ago

Closed 3 months ago

#165 closed defect (migrated)

Command line CBC reports "Optimal solution found", but the solution file reports "Status unknown"

Reported by: dindy Owned by: tkr
Priority: minor Component: Cbc
Version: 2.9.5 Keywords:
Cc:

Description

Hello,

I have a problem where the command line reports "Optimal solution found", with a reasonable objective value, but in the solution file "Status unknown" is reported. CBC has been compiled with MinGW 4.9.2, and works quite well with many other problems. The command line parameters are:

cbc -import pcbc.lp -solve -solution pcbc.sol -quit

By using:

cbc -import pcbc.lp -perturbation off -solve -solution pcbc.sol -quit

I get rid of some infeasibility warnings, the problem get solved to the same exact objective, but the solution file now is correct, so probably it is just a minor problem in the output procedure.

Attached the sample problem.

Thanks in advance for your attention, and thanks also for the excellent work.

Attachments (1)

pcbc.zip (255.1 KB) - added by dindy 4 years ago.
Sample problem

Download all attachments as: .zip

Change History (2)

Changed 4 years ago by dindy

Sample problem

comment:1 Changed 3 months ago by stefan

  • Resolution set to migrated
  • Status changed from new to closed

This ticket has been migrated to GitHub and will be resolved there: https://github.com/coin-or/Cbc/issues/165

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