Please help! I can't take it anymore... Anybody know ANYTHING about a bug in VFP 5.0 / VFP 5.0a related to adding / removing columns in a grid at run-time? I'm designing a grid class with a lot of buit-in features : - click on header > set order to that column - shift+click on header > set filter to that column - select columns & rows and print the selection with a report etc. I also have to add a feature called 'running totals column' (RTC). At run time the user ask for a RTC on a numeric column. Example: This is the grid: client country balance note 001 US 100 srv 002 RO 40 aaa 003 UK 110 aaa 004 RO 50 awe The client add a rtc on Balance and the grid became : client country balance balance(rt) note 001 US 100 100 srv 002 RO 40 140 aaa 003 UK 110 250 aaa 004 RO 50 300 awe Well, everything is working OK except for one tiny detail. Once in a while VFP crash. Let me explain how the grid work. In the init event of the grid I'm, creating a R/W cursor and set a relation from the main table to the cursor. The cursor hold the running totals and what records are selected. When the user ask for a RTC, I add a column to the grid and set the ControlSource of the column to the RT field of the cursor. Well, once in a while VFP crash during that method. It is very difficult to trace because VFP crash whenever he want not when I want. However, it seems that VFP crash when the controlsource of the column is set. Anybody know what the %^$^$* I should do? Pleeeeeeeeeease.