FAQ: Warning: Unrecognized control line from AIX

Problem: I'm printing from my AIX system to RPM, I get warnings in the log about "Unrecognized  control line" and RPM is ignoring the number of copies.

Description: I am printing from IBM's AIX (Unix System V) to RPM Remote Print Manager®, and the following appears in the RPM log:

Furthermore, if I specify the number of copies, RPM ignores it.

Answer: The format of the control lines sent by LPR is documented in RFC 1179. IBM, SCO, and other vendors have chosen to add their own "extended" options. RPM understands the standard BSD control lines.

New versions of RPM should properly handle the "number of copies" feature. These extended options are not documented thoroughly like the RFC 1179 specification.

RPM will ignore all control lines that it does not recognize. In RPM version 2.2, you will receive warnings in your RPM log. These warnings have been down-graded to simple information messages in RPM 2.3/9x and subsequent versions because they are not detrimental to the way RPM processes the rest of the data. They are simply ignored!