Initializing help system before first use

XPRSsetlogfile (SETLOGFILE)

Purpose
This directs all Optimizer output to a log file.
Topic areas
File IO, Logging
Synopsis
int XPRS_CC XPRSsetlogfile(XPRSprob prob, const char *filename);
SETLOGFILE filename
Arguments
prob 
The current problem.
filename 
A string of up to MAXPROBNAMELENGTH characters containing the file name to which all logging output should be written. If set to NULL, redirection of the output will stop and all screen output will be turned back on (except for library users where screen output is always turned off).
Example
The following directs output to the file logfile.log: 
XPRSinit(NULL);
XPRScreateprob(&prob);
XPRSsetlogfile(prob,"logfile.log");
See also examples fixbv.c, globjpar.c, glrhspar.c, knapsack.c, loadlp.c, tableau.c, trimloss.c.
Further information
1. It is recommended that a log file be set up for each problem being worked on, since it provides a means for obtaining any errors or warnings output by the Optimizer during the solution process.
2. If output is redirected with XPRSsetlogfile all screen output will be turned off.
3. Alternatively, an output callback can be defined using XPRSaddcbmessage, which will be called every time a line of text is output. To discard all output messages the OUTPUTLOG integer control can be set to 0.
Related topics
XPRSaddcbmessage.

Parent Topic Console and Library Functions

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