Which database has these stored procedures?
Currently, only Oracle and SQL server are supported.
We have seen this kind of issue when we use Azure Dataware house details in the SQL server connector. which is not supported
If you are using Oracle or SQL server and still facing the issue then use the same credentials that you are using in the Informatica connection in a DB Client and confirm if you are able to see and execute these Stored procedures from the client
To your first question - SQL Server 2014.
Also, tried using the DB client with the same credentials I'm using in informatica which makes the whole thing strange. I was successful when using the DB client (can view and exec SP).
Please confirm if you are using incognito mode?
I am not using incognito mode.