FR_3002, FR_3019 – Operating system error message [The parameter is incorrect]

You might get this error when running a session having File List. There are many of them but the very subtle one is that even if one of the file name is wrongly typed the session will fail when reading the very first file out of the list. This may lead to head scratching & you might end up as zombie. Ideally the filename which is wrong should be flagged in the logs, however what you see is the very first file tagged in front of Error No.

I had my stock Items file something like this

Here the last filename is not having txt suffixed to it, hence the session failed when reading the very first file, though this file in all essence was correct.