I can only assume the command being run is the HTMLDoc binary since the HTMLDoc.pm module is a perl interface to HTMLDoc.

The snippet in my original post is only called once (to convert a HTML file to PDF) which would eliminate the possibility of thousands of processes being called.

Additionally this error only occurs on the 'production' server, so the amount of debugging is limited (e.g. almost none).

There seems to be enough swap-space. I've been monitoring it from time-to-time, the below is typical. 

swap -l
swapfile             dev  swaplo blocks   free
/dev/swap            0,0       8 8228264 3407016

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In reply to Re^2: Not enough space at ... HTMLDoc.pm by biometrics74
in thread Not enough space at ... HTMLDoc.pm by biometrics74

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