I have made some tests. Indeed offline rendering does not work
after a while if no monitor is connected. If you plug in a monitor
all of a sudden everything works again.
Does anybody know how this can be avoided?
Are you using the RemotePBuffer attribute? What do you mean "after a
while"? Any kind of error message in the output (QC will always print
in case of errors)?
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Pierre-Olivier Latour email@hidden
Quartz Composer Team Apple Computer, Inc.