Sending a variable, 5000 record, two sided file to Fiery as PDF-VT. Occasionally the engine will make a stalling sound and the second side of records printing at that time will be blank. Might do it for two to three records and return to printing properly. Lucky we are catching this in finishing dept. or hearing the engine make the sound we know to stop and check print.
And BTW, The pdf when viewing it, has all the pages and sides, even the sides that are missing on the sheets.