Why do I get the question marks on components tags in AutoCAD Electrical?

[219000743]

Hello, guys, I'm still new to AutoCAD Electrical, every time i insert a component, i get the question marks on components tags, how do I solve this problem?

Thank you.

 @219000743 

The topic title has been edited to improve findability by @alina.balkanskaia. Original:  Component tags

[rhesusminus · Accepted solution]

Your tag is set up to use something (the sheet number) in the tags maybe?
And, you haven't filled the sheet number into the page properties??

[219000743]

Thank you @rhesusminus it makes sense now