id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
3305	Derivative of homotopy	Martin Sjölund	Lennart Ochel	"What is the derivative of homotopy? We have the following code commented out:
{{{#!mo
    // differentiate homotopy
    /* case( e as DAE.CALL(
                path = p as Absyn.IDENT(name=""homotopy""),
                expLst = {actual,simplified},
                attr = attr), _, _, _, _)
      equation
        (res, functionTree) = differentiateExp(actual, inDiffwrtCref, inInputData, inDiffType, inFunctionTree);
        // (e2, functionTree) = differentiateExp(simplified, inDiffwrtCref, inInputData, inDiffType, functionTree);
        // res = DAE.CALL(p, {e1, e2}, attr);
      then
        (res, functionTree); */
}}}
For Buildings.Electrical.AC.ThreePhasesUnbalanced.Lines.Examples.ACSimpleGrid_N, replacing the expression with the actual expression works well. So does using the `--replaceHomotopy=actual` flag."	defect	closed	high	1.9.4	Backend	trunk	fixed		Lennart Ochel Willi Braun mbonvini@…