scipopt
Model instance creation causes "SCIP: unspecified error!" for SCIP 8.0.1 built with -DTPI=tny cmake option
Our team successfully used PySCIPOpt 4.2.0 with SCIP 8.0.0 (Linux Ubuntu 20.04, Python 3.8.10).
But when we had built SCIP 8.0.1 and then recompiled PySCIPOpt for this new version all our scripts begin crash on model creation !? For example the operator m = pyscipopt.scip.Model() causes the following message
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Exception Traceback (most recent call last)
src/pyscipopt/scip.pyx in pyscipopt.scip.PY_SCIP_CALL()
Exception: SCIP: method cannot be called at this time in solution process!
Exception ignored in: 'pyscipopt.scip.Model.__dealloc__'
Traceback (most recent call last):
File "src/pyscipopt/scip.pyx", line 252, in pyscipopt.scip.PY_SCIP_CALL
Exception: SCIP: method cannot be called at this time in solution process!
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Why dealloc is called ?!
It seems that the reason is in our build scripts (which we use to make SCIP et al from sources). After installing SCIPOptSuite applications from "legal" DEB-package SCIPOptSuite-8.0.1-Linux-ubuntu.deb PySCIPOpt 4.2.0 seems work properly.
We found that the problem might be caused by setting -DTPI=tny in cmake options (in SCIP build script). To keep multi-threading feature of scip application (see concurrentopt command) we had put -DTPI=omp and the problem seems was resolved. Nevertheless it would be right if developers will issue official recommendation/workaround/patch...
Do you know if the interactive shell on the command line works for the binary built with -DTPI=tny ?
Do you know if the interactive shell on the command line works for the binary built with -DTPI=tny ?
It (SCIP console app built with DTPI=tny) works at all my systems (Ubuntu 20.04, Debian 11). But fscip (FiberSCIP) does not:` [syncstore.c:72] ERROR: Error <0> in function call [scip_general.c:245] ERROR: Error <0> in function call [scip_general.c:289] ERROR: Error <0> in function call [syncstore.c:88] ERROR: Error <0> in function call [scip_general.c:331] ERROR: Error <0> in function call [scipParaInitiator.cpp:391] ERROR: Error <0> in function call 19830 Segmentation fault
If DTPI=omp, then both scip and fscip work as usual ...
Thanks, we will have to look what could cause the incompatibility here.
I'm out of the loop, sorry. Is this issue still relevant @vvvol, or was it fixed in the meantime?
Closing this issue to clear the issue page, but feel free to reopen it if you think it's still necessary.