Subject Multiple Processes with Embedded firebird....
Author Aaron Abend
[I am afraid I know the answer to this:]

Is it possible to have two programs on one computer accessing the same fdb
file at the same time? Seems to work fine with Superserver. I seem to recall
seeing that there were limitations in this regard on Embedded but cannot
find a definitive reference.

I am getting IO errors when the second app tries to connect to the database.
Is there any way to do it? I am using the .NET provider with fb1.5.