customfields referencing non-existent customfields

[Tony Rice]

During a recent full reindex, we're noticing tons of errors complaining about a couple of customfields that no longer exist.

I'm assuming there is a customfield somewhere that has code (such as a JMCF calculated field) which references the fields in question.  I've looked through the JMCF type custom fields and found a bit of dead code that is now commented out, but no references to the ones I was looking for.

Any suggestions on where else to look?  Workflows maybe?  What DB tables would be worth taking a spin through looking for references to custom fields.

[David Fischer _Appfire_]

Can you share an example error with its stack trace if any?