Pen Number Error Message

[Anonymous]

After framing a wall using CadImage I switch to a 3D window and an error message appears stating that " Pen number is greater than 255 or less than 1 at line 27 in the 3D script of file Wall Frame 3D.gsm" When I check properties of the wall frame sure enough the background fill pen assignment is -1....any ideas on why and hoe to correct it without changing each wall individually?

[Anonymous]

Select them all (filter with "find and select") and change just that setting. No other settings should change.

[Anonymous]

Thank you Stuart that was very easy..still can't figure out why it selects -1 as a pen color but I have a call into CadImage and anticipate an answer reall soon.