Kernel BUG, please Help !

HI,

I have started a new round of tests with FreeDOS, and I 
found an annoying bug.

The problem is with NDN real mode version 2.02 and is
probably just a SMALL problem: I cannot copy a file
from one panel to the other using the F5 command.

Everithing else works, including modifying or creating 
a new file with the editor. Looks like it is just one function
that has the problem...

thanks for any help,

Alain
PS. I can send a simplified version to anyone for testing ;-)