understanding error message

How can I understand what is causing this error?

I get the error when my “on idle” call is run, but only when I add the sort option to my table. This table contains a column of dates and I want to sort the column from oldest to newest. The on idle call is deletes everything in the table, then it repopulates it with current data. After it is populated I have it sorting by the date column which works, but will most of the time give me the error above.

Thanks,
Dave

I believe I’ve solved my problem. I added this line of code before my update


set update views of theDataSource to false

and this code after the sort.


set update views of theDataSource to true