long mpiTraceFile(const char *fileName)
Required Header: trace.h
mpiTraceFile causes trace output to be sent to the file fileName. By default, trace output goes to standard output. Note that if fileName is Null, trace output still goes to standard output.
Be careful, you can easily run out of disk space. To save disk space, use a circular file type instead of regular file type.
|MPIMessageOK||if TraceFile successfully causes trace output to be sent to the file|