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.