I am upgrading my zero touch nodes from Dynamo 1.3 to Dynamo 2.0. Dynamo me pop me an error that Polycurve.JoinCurves method isnot found .However, there is no error in visual studio , and both built-in node and code block is able to call this function.
whoops, mis-saw your image - somehow the wrong protogeometry dll appears to be getting loaded since it cannot find the a method that exists in the dynamo 2.x protogeometry dlls.
can you try removing all other packages from dynamo - it’s possible one of them is distributing an old version of protogeometry.