Re: Material Tags Show Question Marks & Empty TagText

This issue has been discussed repeatedly here in the past, but not really explained in depth:

• https://forums.autodesk.com/t5/revit-api-forum/how-get-correct-text-of-independent-tag/m-p/9161393
• https://forums.autodesk.com/t5/revit-api-forum/how-to-check-if-the-text-of-an-independenttag-is-question-mark/m-p/9034117
• https://forums.autodesk.com/t5/revit-api-forum/material-tags-show-question-marks-amp-empty-tagtext/m-p/9716556
• https://forums.autodesk.com/t5/revit-api-forum/find-unhosted-tags/m-p/9049794

Apparently, there can be several different causes and it is important to understand from an end use point of view first.

I searched the Internet for 'revit material tag question mark':

https://duckduckgo.com/?q=revit+material+tag+question+mark

That returns a number of useful explanations:

This knowledgebase article explains some reasons and how to handle them:

https://knowledge.autodesk.com/support/revit-products/troubleshooting/caas/sfdcarticles/sfdcarticles/Question-marks-will-be-displayed-displayed-for-blank-parameters-in-tags-with-more-than-one-label-in-Revit.html

Here is a real-world discussion that explains various additional aspects and problems that may arise:

https://forums.autodesk.com/t5/revit-architecture-forum/material-tags-randomly-change-to-question-marks/td-p/7991724

I hope this helps.

Best regards,

Jeremy