I have recreated subscriptions a dozen times 🙁

Yes that's the first thing i checked when started debugging this.... Am using the latter approach...

There is no reference to the old parameter in RDL.

I actually configure the subscription proc to be called by RS for retrieving parameters that will be used in main report execution.

When i said parameter was removed, it was removed...

Thanks for the reply. I traced it to confirm the params used for the proc. Proc doesn't include the removed param while executing!

Also the report manager shows it would...

Figured out the problem was with the input parameter that was passed to the T-SQL proc which populates the available values. As incorrect param value was passed, the Reporting services...

Thanks for replying! Yes it does and the parameter data type is Int. One thing i left to update here is that the parameter's available values are filled up...