Selection Task Ids giving Error on SAIL

Hi All,

I am trying to get a UI where I can select multiple Task Ids, so I created an all tasks Report with Task Ids. The reportshows fine until I add selection part to report. As soon as I am adding the identifier & selection part, I start getting error: Interface Definition: Expression evaluation error at function a!gridField [line 119]. Can anyone guide me about the issue? Thanks

Attached is the SAIL Code

OriginalPostID-259604

task_selection.txt