mscore command line error (return code 65280}

Hi,

I would like to generate in batch mode pdf files from my .mscz.
I've developped a small perl script using the system perl command to invoke mscore.

When I perform the mscore myfile.mszc -o myfile.pdf manually (from the dos command line) all if fine
When I do the same from my perl script (using the system command) I have a popup "muscore.exe has stopped working" close the program.
The return code caught by the perl script is 65280.
I could not fine log file ..
Any help would be marvelous ..!

Thanks a lot again for this great product. Stable and flexible..!

vpl