Opened 15 years ago
Closed 15 years ago
#324 closed defect (invalid)
LP problem
| Reported by: | Peter Kovacs | Owned by: | Balazs Dezso |
|---|---|---|---|
| Priority: | blocker | Milestone: | LEMON 1.2 release |
| Component: | core | Version: | hg main |
| Keywords: | Cc: | ||
| Revision id: | 48fe2a46bf91 |
Description
Two simple test files are attached using LP. The first one compiles and works correctly using LEMON 0.x, but the second one fails using LEMON 1.x, although they are/must be equivalent. (I ran the tests on lime.cs.elte.hu.)
If the default LP solver is used (Glpk), then lp_test_1x.cpp fails. If CPLEX is used, then it terminates, but it gives bad results (zero for all primal values).
What is the problem here? Why does lp_test pass if this problem is present? Did I miss something?
Attachments (2)
Change History (5)
Changed 15 years ago by
| Attachment: | lp_test_0x.cpp added |
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Changed 15 years ago by
| Attachment: | lp_test_1x.cpp added |
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comment:1 Changed 15 years ago by
comment:2 Changed 15 years ago by
Actually, I used different soplex versions for compiling the library and the executable what is the reason why the soplex failed on my tests.
If I use the right libraries, both versions (1.3.0 and 1.4.2) run properly.
comment:3 Changed 15 years ago by
| Resolution: | → invalid |
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| Status: | new → closed |
Really strange. Although I checked this test many times before I created the ticket (and it did not pass), I cannot reproduce the problem now (using the same repository and options). I can't imagine what the problem was.
I have tested with the following versions: glpk 4.38 - passed cplex 9.1 - passed soplex 1.3.0, 1.4.2 - failed clp 1.10.2 - passed
The result was 30 with problem type 3 for the passed tests. I used debian linux for the tests. The soplex gave segmentation fault, I will investigate the problem. Please, provide additional information for your tests.