Permissions issue when writing lp file from mosel

Before trying to write out the file this way, could you try to run some experiments by adding a few lines into your Mosel source:

1. Check whether the destination directory exists and is writeable (requires: uses "mmsystem"):

 writeln(TemplpFile)

tdir:= pathsplit(SYS_DIR,TemplpFile)

 writeln(tdir)

 fstat:=getfstat(tdir)

 if bittest(fstat, SYS_TYP)<>SYS_DIR

   then writeln("tdir is not a directory")

 end-if

 if bittest(fstat, SYS_WRITE)<>SYS_WRITE

   then writeln("tdir is not writeable")

 end-if

2.Check whether Mosel's temporary directory can be used for writing the file:

 tdir:=gettmpdir

 writeln(tdir)

exportprob(0, string(tdir))

Mosel uses the user's temporary directory as its temporary directory, so you should be seeing some similar output from the second as what you get in the first case.