Failed to compile: Cannot convert source type code 0x70 to destination udclass

[WG-]

As the title tells...

I get the following error: "Failed to compile: Cannot convert source type code 0x70 to destination udclass". It is regarding the VI, selectionSort, which contains a "Call by reference" node. If I remove the node everything is fine (of course) when added and want to save I get the error.

Is it possible to fix? Did I do something wrong?

[Thoric]

In "wgtk_selectionSort.vi", your strictly typed reference to "Less comperator" is bad. Try Right-cliking it and selecting "Select VI Server Class > Browse..." and selecting the lessComperator.vi again. I got it to compile properly in LV 2011: