>The probelem was not with cat but with naming the screen. But anyway, I did as Tamar suggested and MODIied the file in the actual form itself and now it works. this is the code:
>
>

>lnOldWidth = thisform.width
>lnOldHeight = thisform.Height
>thisform.Closable = .f.
>thisform.Height = 400
>thisform.Width = 500
>
>MODIFY FILE (lcPath + 'SKUDUPES.TXT') IN WINDOW frmSkud WINDOW frmSkud NOEDIT
>
>thisform.Height = lnOldHeight 
>thisform.Width = lnOldWidth 
>

>
>thanks for your help

Glad you got it solved.