Nope, no error messages. When I send a printing job the printer queue window opens, sent the file and close without any error or message, nevertheless the printer does nothing.
The error_log in cups is empty.
The next text is on access_log for a test I've done.
localhost - - [20/Oct/2014:14:01:08 -0500] "POST / HTTP/1.1" 401 122 CUPS-Get-Devices successful-ok
localhost - nelson [20/Oct/2014:14:01:08 -0500] "POST / HTTP/1.1" 200 1925 CUPS-Get-Devices -
localhost - - [20/Oct/2014:14:01:39 -0500] "POST / HTTP/1.1" 401 122 CUPS-Get-Devices successful-ok
localhost - nelson [20/Oct/2014:14:01:39 -0500] "POST / HTTP/1.1" 200 1925 CUPS-Get-Devices -
localhost - - [20/Oct/2014:14:01:50 -0500] "POST / HTTP/1.1" 200 1129549 CUPS-Get-PPDs -
localhost - - [20/Oct/2014:14:01:55 -0500] "POST / HTTP/1.1" 200 1129549 CUPS-Get-PPDs -
localhost - - [20/Oct/2014:14:01:56 -0500] "POST / HTTP/1.1" 200 1129549 CUPS-Get-PPDs -
localhost - - [20/Oct/2014:14:02:00 -0500] "POST / HTTP/1.1" 200 1129549 CUPS-Get-PPDs -
localhost - - [20/Oct/2014:14:02:12 -0500] "POST /admin/ HTTP/1.1" 401 72345 CUPS-Add-Modify-Printer successful-ok
localhost - nelson [20/Oct/2014:14:02:12 -0500] "POST /admin/ HTTP/1.1" 200 72345 CUPS-Add-Modify-Printer successful-ok
localhost - - [20/Oct/2014:14:03:45 -0500] "POST /printers/_192_168_3_19 HTTP/1.1" 200 4049 Create-Job successful-ok
localhost - - [20/Oct/2014:14:03:45 -0500] "POST /printers/_192_168_3_19 HTTP/1.1" 200 3869173 Send-Document successful-ok
localhost - - [20/Oct/2014:14:03:46 -0500] "POST / HTTP/1.1" 200 343 Set-Job-Attributes successful-ok
localhost - - [20/Oct/2014:14:03:50 -0500] "POST / HTTP/1.1" 200 3869009 CUPS-Get-Document successful-ok