Hi again Dave.
I decided to try out imaxima again (see separate email) and in the process
found the the value of the prefix variable in "bin/maxima.bat" was set to
"c:/maxima" rather than "c:\\lang\\maxima-5.9.0.9beta1".
A quick edit fixed the problem and clicking on the batch file in Explorer
and launching it worked OK after that change.
Cheers
Mike Thomas.