GhostPCL errors out in the fts.0810 file, apparently in the 2:2 panel of the initial page. main/obj/pcl6 -dBATCH -dNOPAUSE ../tests_private/pcl/pcl5cfts/fts.0810 Warning interpreter exited with error code -15 Flushing to end of job Many files actually report this error, but this one in particular shows up with the bitcmyk and bitrgb devices at 600 dpi, which were recently added to the cluster regressions, because no output is ever produced. A partial ppmraw file is produced at 600 dpi, which is why it wasn't noticed earlier.
The problem in fts.0810 is fixed in ghostpcl 3115. Other problems should be reported separately.