actually, my sketchup pro 2017 (v17.0.18899) was working properly, without any problem!
I just Uninstall and reinstall it again (v17.2.2555) and this problem appeared!.
I read and do many many things such as checking my local and language option but everything was ok! so last night just uninstall the sketchup (v17.2.2555) and install the version ([highlight=#ffff80:2wtf7s7m]v17.0.18899[/highlight:2wtf7s7m]), and without any change to my regional and language Option everything is fine.

Hi everyone
I'm using SketchUp for several years,
but today have a problem!!!
till now for drawing a rectangle and ... i used ( , ) for example 10,20 to draw a rectangle but, today i reinstalled my sketchup Pro 2017 and i don't know why, but should use ( ; ) instead of ( , )!!!!

what should i do to do the same like before and usign ( , ) and not (; )?