@tsdgeos Thanks. This was some event handler (onTriggered), and there was another reference to the same object in the line above that worked. It is a function, so javascript - = tends to work in such cases.In the meantime I changed some things, and got it working, but I do sometimes run into issues like that. In this case there was no warning or hint, so I used a function to access the object, and it worked. I believe it had to do with me using a stringlist as model, and using a proper ListModel made it go away
