saving a stackfile from a standalone

[Martin Meili]

hi,
I've got 2 stacks:

A.) a stack saved as a standalone (splash screen), as far as I understand it
holds the engine. The engine should be able to save stackfiles, also running
under Windows

B.) a stackfile which is neither a standalone nor a substack of A, so it is
an independent file

In A I've got the following script:

on closestack
save stack B
end closestack

This works without any problems if I run my program on my Mac, but data are
not stored if I try doing the same on a Windows PC.

What am I understanding/doing wrong?

Thanks for your help.

Martin