I believe this might be the previous conversation you are referencing:
It was not confirmed what error message that user was having. Several of us suspected that he was successful avoiding the error message by having a really slow plunge rate and a short pierce delay. Most of us were under the impression that his pierce delay was far too short.
If @clio has tried 0.9 seconds and it did not change it, he might also consider air pressure. Perhaps the plasma cutter is not firing at all.