The file was created, so the open appear to have succeeded.
It's not clear in the original posting that this might not be an empty file in the way of the actual creation. Adding an "or die" here would be useful to rule that out.

-- Randal L. Schwartz, Perl hacker
Be sure to read my standard disclaimer if this is a reply.

In reply to Re^3: GraphViz , apache by merlyn
in thread GraphViz , apache by jeteve

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