https://forums.autodesk.com/t5/fusion-design-validate-document/modulo-bug/m-p/5859444#M283301 <P>Ok, I did a bit more testing and I now understand better where the problem arrises. I can ender % in a dimension, &nbsp;and get the formula to work (I missed out the units in my initial post, I was going from memory) that's all fine. However if I go back to that dimension and try to edit it, thats when it locks up for me. Fusion becomes unresponsive and if I try to end the skecth the screen goes all skewy.&nbsp;</P><P>&nbsp;</P><P>You can see this in the screencast below. I put in the dimension and am able to end the sketch sucessfully. Then I go back in and try to edit and it locks up. I go a bit frantic there just to illustrate&nbsp;that nothing is responding anymore.</P><P>&nbsp;</P><P>I hope that helps you pinpoint better where the issue might lie.</P><P>&nbsp;</P><P>For now,&nbsp;<a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/2782855">@HughesTooling</a>&nbsp;workaround of setting up a user parameter works, thanks for that tip!&nbsp;</P><P>&nbsp;</P><P><A href="https://screencast.autodesk.com/main/details/79c1c6a7-0874-4853-bbcc-750d3dc7ad7a" target="_blank">https://screencast.autodesk.com/main/details/79c1c6a7-0874-4853-bbcc-750d3dc7ad7a</A></P><P>&nbsp;</P><P>Cheers,</P><P>Niels</P><P>&nbsp;</P><P>&nbsp;</P> Tue, 13 Oct 2015 16:14:27 GMT Anonymous 2015-10-13T16:14:27Z