https://forums.autodesk.com/t5/fusion-educators-read-only/spool-isometrics/m-p/5930722#M763 <P>I had a similar error when trying to convert the value of the &lt;WEIGHT&gt; tag to KG. I think the isogen is looking for that tag on its own, and if it sees something =&lt;WEIGHT&gt;* .blah blah, it breaks. I had to create a custom property to get the desired result.</P> Tue, 01 Dec 2015 10:36:14 GMT OptimusCAD 2015-12-01T10:36:14Z