I spent some time creating a custom properties setup for Drawings and Parts to pull in their Material and Mass for display on drawings but since updating to SP3 I now get an error.

"Error Processing Template File C:\sw2017custom\templatepart.prtprp. Syntax May be invalid"

And nothing is show in the right hand menu where you used to be able to select or type values.

I've seen similar questions asked here but the answer always relates to using an excel file or relinking other files, which is not the case here.

If i create a new template in the Custom Property Builder it still reports a syntax error even if i leave the properties all blank.