I'm trying to convert a normal path (new generated) to Work path:

...[rest of the code]

var thePath = doc.pathItems.add("thePath", pathArray);

thePath.kind = PathKind.WORKPATH;

But I'm getting the error 1220: Illegal argument in the last line

What I'm doing wrong?

Is it possible to convert a normal path into a Work Path?

Or: is it possible to add "thePath" as a "work path" instead as a normal path?