MPLIR05534I Not a PRINT file.

An attempt has been made operate on a FILE that has not been OPEN(d) as PRINT via the combination of Declaration, JCL, and/or environment variables. .
Resolution:
Correct the logical error and run again. PL/I RTS #fileio ctf tracing may provide you with additional information as to the root cause.
Module:
line.pl1, nfmt.pl1, page,pl1