Receiving an error I haven't seen before

It's a notice, so it can probably be ignored for now, but I'm having trouble finding the line which caused the error, since there doesn't appear to be any code which would cause it on that line number in the current versions of CodeIgniter.

One of the reasons this particular error message might show up when it did not before would be an upgrade of the version of PHP on the server, or a change in the level of error reporting (which is normal when changing the ENVIRONMENT, as you already mentioned).

OK...  thanks for the info...  

Russ