🚀 go-pugleaf

I got some strange messages in the printer log file of my postscript
job, like:
psif: printer sync problem [2] ()
psif: Status message too long: (%%[ Flushing: rest of job (to end-of-file) will be ignored ]%%)
psif: printer sync problem [5] ()
These where mixed with my output ("print" postscript commands),
when I executed my error handler. The paper output was correct
(and was produced at the same time as the output messages).
Another problem that I had may be related:
Some other times I had execute that program, I had a timeout error,
and the paper output was incomplete.
I had not changed the jobtimeout value, and the default value in the
printer is 0 (= unlimited), and I use no manualfeed.
So it must be the waittimeout, the time the server will wait to
receive additional input for a job that is in progress
(red book, page 287).
But it should not be caused by a program (this is to protect the
LaserWriter from being tied up indefinitely by a host that crashes
or is disconnected in the midst of sending a file to the server).
I know that I can change the limit, but this is not the solution I
am looking for the reason that is causing the error.
What could be wrong in my program and cause such behavior ?
Any ideas or similar situations ?

thanks
sarantos