Error setting property 'null' for binding

I am getting this error: "error setting property ‘null’ for bonding on … caused by NullPointer Exception. Can somebody how to deal with this error? Thank you

Try and research the coalesce expression function in the user manual in appendix B. Hope this helps.

Thanks, I found out that the project did not have the tags loaded, since we were migrating from one computer to another. Once we loaded the tags, they show properly on the graphics.