Hi Dave
Looking at the log again I do see a difference since updating the libcx0.dll
Previous logs have gstoraster reported as stopped (logs from working non-rpm cups showed exited with no errors) before rastertogutenprint "exited with no errors":-
D [28/Apr/2017:17:01:07 +0000] [Job 1] Waiting for read thread to exit...
1045 D [28/Apr/2017:17:01:07 +0000] [Job 1] PID 129 (/@unixroot/usr/lib/cups/filter/gstoraster.exe) stopped with status 11.
1046 W [28/Apr/2017:17:01:07 +0000] cupsdDoSelect: select() returned -1... pause and retry select()
1047 D [28/Apr/2017:17:01:07 +0000] [Job 1] Read 512 bytes of back-channel data...
1048 D [28/Apr/2017:17:01:07 +0000] [Job 1] PID 130 (/@unixroot/usr/lib/cups/filter/rastertogutenprint.5.2.exe) exited with no errors.
Since the update the logs report that slightly differently:-
D [29/Apr/2017:03:39:45 +0000] [Job 1] Read 512 bytes of back-channel data...
d [29/Apr/2017:03:39:45 +0000] process_children()
d [29/Apr/2017:03:39:45 +0000] cupsdFinishProcess(pid=198, name=0x17f700, namelen=1024, job_id=0x17f6fc(1)) = "/@unixroot/usr/lib/cups/filter/rastertogutenprint.5.2.exe"
D [29/Apr/2017:03:39:45 +0000] [Job 1] PID 198 (/@unixroot/usr/lib/cups/filter/rastertogutenprint.5.2.exe) exited with no errors.
d [29/Apr/2017:03:39:45 +0000] cupsdFinishProcess(pid=197, name=0x17f700, namelen=1024, job_id=0x17f6fc(1)) = "/@unixroot/usr/lib/cups/filter/gstoraster.exe"
D [29/Apr/2017:03:39:45 +0000] [Job 1] PID 197 (/@unixroot/usr/lib/cups/filter/gstoraster.exe) stopped with status 11.
Based on all previous logs checked on all systems here the above looks wrong and seems to be a direct result of the libcx0.dll update.
Regards
Pete