forgot to close file handle

I've been testing a procedure using the utl_file package and some exceptions have been thrown where the hand is not closed. utl_file.fclose(handle) was not run. Now when I try to replace the file with a new one via ftp I get a "Cannot open or remove a file containing a running program" which I assume is because Oracle is still maintaining some hold on the file. This is Oracle 8.1.5 on AIX 4.2.3. How can I find these processes and shut them down? Any ideas?

• Dc.