Forum Discussion
How to detect between termination by timeout or tolerance
The documentation doesn't clearly explain XPRS_UNF. I believe it means the optimisation finished either due to a XPRS_MAXTIME being reached or a tolerance being met. Without comparing time and tolera...
You can query the solver attribute STOPSTATUS. Assuming you are working with Mosel, you could use for example:
declarations
STOPVAL: array(integer) of string
end-declarations
STOPVAL::([XPRS_STOP_NONE, XPRS_STOP_TIMELIMIT, XPRS_STOP_CTRLC,
XPRS_STOP_NODELIMIT, XPRS_STOP_ITERLIMIT, XPRS_STOP_MIPGAP,
XPRS_STOP_SOLLIMIT, XPRS_STOP_MEMORYERROR, XPRS_STOP_USER,
XPRS_STOP_SOLVECOMPLETE, XPRS_STOP_LICENSELOST, XPRS_STOP_NUMERICALERROR])
["solve completed normally", "time limit hit", "user hit control C",
"node limit hit", "LP iteration limit hit", "MIP gap is sufficiently small",
"solution limit hit", "insufficient memory", "user interrupt",
"MIP solve completed without fully exploring the tree",
"license has been lost", "numerical errors encountered"]
if getprobstat=XPRS_UNF:
writeln(STOPVAL(getparam("XPRS_STOPSTATUS")))