Nils, I must say this is an awesome library.

I was running thru a few test scenarios...

Most worked as expected.

The first I found that did not work so well was "ApiColumnRemove". This works well for normal columns, but I tested against removing "overlap" fields, and it did not give an error, but did not seem to work correctly.

The overlap fields were gone after, but for each overlap there was a column of "Field_##" appended to the end of the file. So, the total number of columns in the table did not change.