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Using Optimizer Console for running matrices within Mosel Description Is it possible to run matrices from Workbench / Mosel? Not directly, but you can use the Optimizer command of the module mmxprs to work with the Optimizer Console from within Mosel. In this case there is no problem representation in Mosel, but solver controls and attributes (setparam and getparam routines on "XPRS_" parameters) and simple (logging) callbacks can be used. If needed, a Mosel program can parse solver output files (see Appendix 'Log and file formats' of the Optimizer Reference Manual) to retrieve information into Mosel.
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Data Files runmatparam.mos (!****************************************************** Mosel Example Problems ====================== file runmatparam.mos ```````````````````` Use Optimizer 'command' to read+solve a matrix file -- Various ways of setting and retrieving solver parameters -- (c) 2017-2022 Fair Isaac Corporation author: S.Heipcke, 11 Sep 2017, rev. Oct. 2022 *******************************************************!) model "running Optimizer command line" uses "mmsystem", "mmxprs" ! Load+run an MPS format matrix scriptmps:=` readprob folio10 chgobjsense max mipoptimize writeprtsol optsol.prt ` public declarations tmptxt: text end-declarations ! Setting a solver control parameter command("THREADS=2") ! It is not possible to retrieve parameter values via console commands, but ! they can be accessed via Mosel set/getparam routines writeln_("Threads setting:", getparam("XPRS_THREADS")) ! setparam("XPRS_verbose", true) setparam("realfmt","%.3f") ! Redefine Mosel number printing format stime:=gettime command(scriptmps) writeln_("(", gettime-stime, "sec) Max used memory:", getparam("XPRS_PEAKMEMORY"), ", total nodes:", getparam("XPRS_NODES")) ! Apply solver parameter settings from a text file at runtime fcopy("optparams.txt", "text:tmptxt") command(string(tmptxt)) ! Or: Include solver parameter settings from a text file at compile time ! command(`optparams.txt`) stime:=gettime command(scriptmps) writeln_("(", gettime-stime, "sec) Max used memory:", getparam("XPRS_PEAKMEMORY"), ", total nodes:", getparam("XPRS_NODES")) ! Load solution log into Mosel, eg to extract/display some information from it declarations public sollog: text end-declarations fcopy("optsol.prt", "text:sollog") ! Display the start of the solver solution output writeln(text(sollog,750), "\n [...truncated...]") tobj:="Objective function value is" pos:=findtext(sollog, tobj, 1) objval:=parsereal(sollog, pos+tobj.size) writeln_("Objective value: ", objval) end-model
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