Sandeep,

> I'm getting following error
>
> ISC error code: 335544344
> ISC error message: I/O error for file d:\vl2\data\cfldata.gdb
> Error while trying to write to file
> The process cannot access the file because another process has locked a
> portion of the file.

Are you using embedded Firebird 1.5 and try to connect twice? You can't.

Artur