Hi,

I have a problem.

I am using cplex to solve a cover set and in some case when I call the solve() function I get the following result:

Tried aggregator 1 time.
MIP Presolve eliminated 274 rows and 296 columns.
All rows and columns eliminated.
Presolve time = 0.00 sec. (0.16 ticks)

Root node processing (before b&c):
  Real time             =    0.00 sec. (0.20 ticks)
Parallel b&c, 12 threads:
  Real time             =    0.00 sec. (0.00 ticks)
  Sync time (average)   =    0.00 sec.
  Wait time (average)   =    0.00 sec.
                          ------------
Total (root+branch&cut) =    0.00 sec. (0.20 ticks)

From what I understand, the problem is "simple" and was solved directly in the presolve phase.

What i don't understand is:

1) How come in these cases the solve() function returns false while getCplexStatus() and getStatus() return CplexStatus::CPX_STAT_OPTIMAL and Status::Optimal, respectively.

2) How can I get the value of the variables that are part of the solution? If I try to call the getValues() function an exception is thrown.

Duplicate, see https://community.ibm.com/community/user/ai-datascience/discussion/solve-returns-false-but-getcplexstatus-shows-optimal-all-rows-and-columns-eliminated