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unable to make a closed sketch using "equation driven curves" option

Question asked by Foad Sojoodi Farimani on May 17, 2017

Following the discussions here and here, I'm trying to make a closed loop 2D/3D sketch using the "equation driven curves". However when I want to make aclosed curve it does not work. for example when I put :

t from 0 to 2*PI



I get the error below:



It is disappointing, because other software packages such as PTC Creo, Autodesk Inventor and even open source ones like FreeCAD, have this feature!


the reason, I need a closed loop equation driven curve is that if I use only an instance of my periodic function and then use a feature pattern, then later when I change the number of instances there will be an error.