Filer bug??

I'm having a very strange problem with Filer. It happens both with gcc and vbcc (vc).

I have an c file called cmain.c on an USB stick. I run the following command in a shell:

USB00: vc -S cmain.c -o cmain.asm

When vc returns, I get an error requester from Filer saying:

"Ugyldig objectlås (invalid object lock)

Process: Filer
Function: "Unlock()"
"

Try to run snoopy, to monitor whats going on, it might be problem caused by the filesystem used.

The very strange thing is, that it happens only with that sepcific command, and only when the file is placed in the subdir "wipeout" (doesn't happen in the base directory).

For instance "vc cmain.c" works without problems.

EDIT: I might have to modify that last statement. The behavior seems to be very random.