Can I Call Update task function module in a User-exit

Hi All,

Just wanted to know if I can call Update task function module in a User-exit ..

I have used it many times and is workin fine also, but one of my colleuge told me that we should not use Update task function module in a User-exit ...

Just wanted to have some idea, any standard sap Documnet will be too too helpful.

Thanking You All..!!