D [24/Apr/2017:23:22:40 +0530] [Job 38] 4 filters for job:
D [24/Apr/2017:23:22:40 +0530] [Job 38] envp[9]="PATH=/usr/lib/cups/filter:/usr/bin:/usr/sbin:/bin:/usr/bin"
I [24/Apr/2017:23:22:40 +0530] [Job 38] Started filter /usr/lib/cups/filter/bannertopdf (PID 26026)
I [24/Apr/2017:23:22:40 +0530] [Job 38] Started filter /usr/lib/cups/filter/pdftopdf (PID 26027)
I [24/Apr/2017:23:22:40 +0530] [Job 38] Started filter /usr/lib/cups/filter/gstoraster (PID 26028)
I [24/Apr/2017:23:22:40 +0530] [Job 38] Started filter /usr/lib/cups/filter/rastertocanonij (PID 26029)
D [24/Apr/2017:23:22:40 +0530] [Job 38] PID 26029 (/usr/lib/cups/filter/rastertocanonij) stopped with status 255 (Unknown error 155)
D [24/Apr/2017:23:22:40 +0530] [Job 38] PID 26026 (/usr/lib/cups/filter/bannertopdf) exited with no errors.
D [24/Apr/2017:23:22:40 +0530] [Job 38] PID 26027 (/usr/lib/cups/filter/pdftopdf) exited with no errors.
D [24/Apr/2017:23:22:40 +0530] [Job 38] envp[9]="PATH=/usr/lib/cups/filter:/usr/bin:/usr/sbin:/bin:/usr/bin"
D [24/Apr/2017:23:22:40 +0530] [Job 38] PID 26028 (/usr/lib/cups/filter/gstoraster) exited with no errors.
E [24/Apr/2017:23:22:40 +0530] [Job 38] Job stopped due to filter errors; please consult the error_log file for details.
D [24/Apr/2017:23:22:42 +0530] [CGI] envp[9] = "PATH=/usr/lib/cups/filter:/usr/bin:/usr/sbin:/bin:/usr/bin"
D [24/Apr/2017:23:22:42 +0530] [CGI] cgiSetArray: job_printer_state_message[0]="Filter failed"