Can't select elements in the elements list

I've had this bug a few times in the past.

Sometimes, opening the Elements List I can't see the fist column before the From Node column. This column is used to select a complete line (i.e. element). I therefore can't select multiple elements to do block operations on.

Unpinning and moving the Elements List window does not help. Is there a fix to this ?



edit: image link to view in higher res
https://i.imgur.com/hAc1EgN.png

Delete the .GRD file "grid file" in the working folder.

It worked after I deleted the file, closed and reopened the piping input!
Thanks for the help.