Yes, that's perfect. Will add linkTrackVars too. Was trying to push the same code in Launch. Thanks a bunch for the great help @Eric_Matisoff_

Got it. Yes, did make sure there isn't any whitespace character. The reason might be we are not sending this variable as s.listX.

This makes total sense now. So the variables the should be populated are s.listX. In Launch, I don't see "set variables" section has listVar. Maybe that needs to be configured in custom code section

That might be the issue. But we don't see the listX populated in the reports. Might be because in the logs, as I mentioned the values are eVarX instead of listX. Is that the reason ?