Why does drawing or model become write protected

[jchungbin]

1. I open a model

2. Work on it

3. Try to save it and it says "drawing is write protected"

Why does it do this?

How do I change it? 

This happens sometimes.  It is a total waste of time.

[BrettWright]

hi Jerry,

Sorry for the trouble you're having here.

Can you please tell me what product you're using here so that i can get you in touch with the correct team?

Let me know,