Thanks for your reply. Something like this? The connection with the printer is good, I can see the supply levels.
D [19/Oct/2014:21:10:20 +0200] [Job 17] 2014-10-19 21:10:20.573 OKIHC004[995:87181] __agent_connection_block_invoke_2: Connection error - Connection invalid
D [19/Oct/2014:21:10:20 +0200] [Job 17] no reply!
D [19/Oct/2014:21:10:20 +0200] [Job 17] DCSUtility DoInit SaveDCSwithPrinterID start
D [19/Oct/2014:21:10:20 +0200] [Job 17] GetDCSData CFArrayGetValueAtIndex Error!
D [19/Oct/2014:21:10:20 +0200] [Job 17] cgpdftoraster: rasterWriteLine: (null)
D [19/Oct/2014:21:10:20 +0200] [Job 17] cgpdftoraster: bytes written for side 1 = 7852752
D [19/Oct/2014:21:10:20 +0200] [Job 17] PID 995 (/Library/Printers/OKIDATA/Filters/OKIHC004.plugin/Contents/MacOS/OKIHC004) stopped with status 1.
D [19/Oct/2014:21:10:20 +0200] [Job 17] Hint: Try setting the LogLevel to "debug" to find out more.
D [19/Oct/2014:21:10:20 +0200] [Job 17] PID 996 (/usr/libexec/cups/backend/lpd) exited with no errors.
D [19/Oct/2014:21:10:20 +0200] [Job 17] PID 994 (/usr/libexec/cups/filter/cgpdftoraster) exited with no errors.
D [19/Oct/2014:21:10:20 +0200] [Job 17] End of messages
D [19/Oct/2014:21:10:20 +0200] [Job 17] printer-state=3(idle)
D [19/Oct/2014:21:10:20 +0200] [Job 17] printer-state-message="Filter failed"
D [19/Oct/2014:21:10:20 +0200] [Job 17] printer-state-reasons=none