Bug in Export Utility

There was a bug in the Export utility that would cause error messages and an eventual shutdown of the program.

This bug did not seem to be triggered all the time, and was almost always a result of attempting to export the whole file (instead of stopping after the 100 record prompt).

It should be fixed in 233.

Note: There is an easy workaround for this. Select your file, start MARC Review, press Skip, and select 'Full record' on the Text Output options page.