Bhavbhuti,

Can you make a copy of the form or project and try setting all the input masks back to default as a test? Doing one by one would be the best way to see which one is causing the problem. Or adding values back into the input mask one by one. Also, are there any classes involved here? You mentioned that it is starting to occur other places as well.

Renoir

>Hi all
>
>Recently I seem to be having this error:
>
>Expression is invalid. Use a valid expression for INPUTMASK property.
>
>This seems to be happening in grids only. Why it happens I really can't understand. I had these grids which were working alright. I have checked INPUTMASKs of all columns and controls, most of which were empty.
>
>One grid like I said working alright, I added a column to it and this message started.
>
>Please advise. I have run out of ideas and this was once a single project problem seems to have come up in other project also.