N. Troubleshooting Guide : Running a Completed Application : Table Fields
 
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Table Fields
If you are having problems getting the correct data into or out of table fields, be sure that:
Your table field manipulation statements (such as insertrow) correctly refer to the row number for the data window rather than the record number in the entire data set
If you have defined a menu item that operates on the current row, then you have issued an inquire_forms statement to check that the cursor is in the table field before the menu item is activated
You have not attempted to issue nested unloadtable loops; that is, a loop that starts another loop
You have not selected so much data into a table field that your system slows down or even crashes because of inadequate memory