https://forums.autodesk.com/t5/fusion-design-validate-document/modulo-bug/m-p/5858468#M283297 <P>I was able to get this to work for me. &nbsp;One thing I had to do was to change the string to "(d1 / 25in)/2" to get Fusion to accept it. &nbsp;Adding the units is a little fussy, I know, but it does work for me.</P> <P>&nbsp;</P> <P>Here is a screencast that shows this workflow. &nbsp;If my workflow is different than yours, that could be the difference.</P> <P>&nbsp;</P> <IFRAME width="640" height="400" src="https://screencast.autodesk.com/Embed/500843cc-cfcc-477b-acec-4957a7fe4c97" frameborder="0" allowfullscreen="" webkitallowfullscreen=""></IFRAME> <P>&nbsp;</P> <P>Thanks for posting</P> <P>&nbsp;</P> <P>Jeff Strater</P> Tue, 13 Oct 2015 03:35:48 GMT jeff_strater 2015-10-13T03:35:48Z