PCL output not duplexing

OL Connect Professional
1

Attempting to get PCL output to duplex, but it is resisting all my attempts.
I figure that I’m missing something, but can’t seem to find it.

The data input is PDF from the DataMapper.

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I only have limited access to a printer, so relying on a PCL decoder to analyze to look for the PCL duplex commands.

# Ec &l1S Duplex Long-edge binding
# Ec &l2S Duplex Short-edge binding
2

Omit Empty Backside results in mixed-plex, which some printers don’t like. Have you tried without that option?