Epson EPL-6100 Reference Manual page 228

Insufficient memory to print all copies
Cause
The printer does not have
sufficient memory to collate
print jobs.
126 Troubleshooting
What to do
Only one set of copies will be printed.
Reduce the contents of print jobs, or add
more memory. For information on
installing more memory, see
Module" on page 10 .
"Memory