Explanation
An error occurred while this program
was running. The errno value, which might provide
additional information, resides in /usr/include/sys/errno.h on UNIX systems, /usr/include/errno.h on z/OS® systems, and /QIBM/include/errno.h on
IBM i systems.Example: 
Unable to write to file
>/arscache1/13585/SL/DOC/1502FAA<.
errno=28 Srvr->www.example.com<-User response
Verify that the directory path exists and that the
file permissions are correct. Then try the command again. See the errno.h file
for more information. If the problem persists, contact your IBM® Service Representative.