pass two entity objects to a microflow with mx.data.action(..)

Hi, I’m working on this pluggable widget and I need to pass two objects to a microflow out of the widget. I have the following piece of code: mx.data.action({ params: { applyto: "selection", actionname: "MyFirstModule.ACT_Instance_OnClick", guids: ["8162774324609525", "7318349394477057"] }, error: console.error, }); Everything seems to work, no exception is thrown and the breakpoint in the microflow in the mendix studio pro hits.  The issue is that both of the parameters are empty. If I remove either one of the guids and only pass one of them I successfully obtain the object. I can’t seem to get it to work with two though.   The example from the documentation looks similar: mx.data.action({ params: { applyto: "selection" actionname: "MyFirstModule.GetFavoriteFood", guids: [ "281530811285515", "281530811285506"] }, ... }); I also found this question, but the answer doesn’t help.    Why doesn’t it work? What am I doing wrong?   Thanks for your help! - Tobias