Periodically we get a question about not being able to assign tag information to instruments. It turns out there is some sort of bug that is setting the instrument tag properties read-only.
To fix it, go to project setup.
Navigate to P&ID DWG Settings > P&ID Class Definitions > Engineering Items > Instrumentation. Make sure the Area, Type, and Loop Number properties are not set to read-only. In the picture below Loop Number is located out of the screenshot.
