[Scip] LP Error (CPLEX)

[Julian Lamberty]

OK, seems to be parameter 1020, looks like an integer overflow:


setting CPLEX int parameter 1020 from 113876 to 1
setting CPLEX int parameter 1020 from 1 to 2
setting CPLEX int parameter 1020 from 2 to 4
setting CPLEX int parameter 1020 from 4 to 8
setting CPLEX int parameter 1020 from 8 to 16
setting CPLEX int parameter 1020 from 16 to 32
setting CPLEX int parameter 1020 from 32 to 64
setting CPLEX int parameter 1020 from 64 to 128
setting CPLEX int parameter 1020 from 128 to 256
setting CPLEX int parameter 1020 from 256 to 512
setting CPLEX int parameter 1020 from 512 to 1024
setting CPLEX int parameter 1020 from 1024 to 2048
setting CPLEX int parameter 1020 from 2048 to 4096
setting CPLEX int parameter 1020 from 4096 to 8192
setting CPLEX int parameter 1020 from 8192 to 16384
setting CPLEX int parameter 1020 from 16384 to 32768
setting CPLEX int parameter 1020 from 32768 to 65536
setting CPLEX int parameter 1020 from 65536 to 131072
setting CPLEX int parameter 1020 from 131072 to 262144
setting CPLEX int parameter 1020 from 262144 to 524288
setting CPLEX int parameter 1020 from 524288 to 1048576
setting CPLEX int parameter 1020 from 1048576 to 2097152
setting CPLEX int parameter 1020 from 2097152 to 4194304
setting CPLEX int parameter 1020 from 4194304 to 8388608
setting CPLEX int parameter 1020 from 8388608 to 16777216
setting CPLEX int parameter 1020 from 16777216 to 33554432
setting CPLEX int parameter 1020 from 33554432 to 67108864
setting CPLEX int parameter 1020 from 67108864 to 134217728
setting CPLEX int parameter 1020 from 134217728 to 268435456
setting CPLEX int parameter 1020 from 268435456 to 536870912
setting CPLEX int parameter 1020 from 536870912 to 1073741824
setting CPLEX int parameter 1020 from 1073741824 to -2147483648
[src/scip/lpi_cpx.c:475] ERROR: LP Error: CPLEX returned 1014
[src/scip/lpi_cpx.c:1931] ERROR: Error <-6> in function call
setting CPLEX int parameter 1017 from 1 to 0
khc3: src/scip/lpi_cpx.c:449: checkParameterValues: Assertion 
`curparam.intparval[i] == par.intparval[i]' failed.
Abort

Regards
Julian


Tobias Achterberg schrieb:
> 
> 
> Julian Lamberty wrote:
>> Hi!
>>
>> Another Problem has occured in our described column generation problem 
>> (The "Overly motivated presolver" thread).
>>
>> In some constellations (changes in the objective function, varying the 
>> number of paths initially generated before pricing) the following 
>> error comes up:
>>
>> [src/scip/lpi_cpx.c:475] ERROR: LP Error: CPLEX returned 1014
>> [src/scip/lpi_cpx.c:1931] ERROR: Error <-6> in function call
>> khc3: src/scip/lpi_cpx.c:449: checkParameterValues: Assertion 
>> `curparam.intparval[i] == par.intparval[i]' failed.
>> Abort
>>
>> What does this mean?
> 
> The CPLEX 1014 error means "Parameter value too small", and the location 
> you mentioned is for CPXsetintparam(). This is strange.
> 
> Let's try to find out which parameter it is. In line lpi_cpx.c:472, 
> there is the code
> 
>          SCIPdebugMessage("setting CPLEX int parameter %d from %d to %d\n",
>             intparam[i], curparam.intparval[i], cpxparam->intparval[i]);
> 
> Could you please replace the "SCIPdebugMessage" with "printf"?
> 
> 
> Tobias
> 

-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 5909 bytes
Desc: S/MIME Cryptographic Signature
Url : http://listserv.zib.de/mailman/private/scip/attachments/20080930/b69a5c5c/smime.bin