When editing a drawing in MS Visio 2003 I need to change the size of a text. Every time I change the number in size box the message is appearing on the screen and say "Invalid number".
I traveled the net in all directions and I didn't find a solution. I tried re-saving of the drawing, copying all contents into new file and I'm still getting this error. I think that this error is caused by shape-related damage, because it is also happening in a new file with copied text from original drawing. I'm stuck with Visio 2003, I cannot switch to later version.
Does anybody know how to solve this ? This drawing is too complex (industrial network scheme) to start it again from scratch.