Thanks all who posted! I'm back and I'll try to clear any confusion:
- OA should definitely be able to display NER code, the trick is to double-click the "Function" entries in the "Search Results" pane, not the "BSFN" ones, because it would display the .C and .H files for the BSFN instead of the ER code. The ER code is stored by function within the BSFN (i.e.: one BSFN can have multiple Functions in it).
- Once you have the right function opened in the left pane, right-click on the function name (in the first line) and select "Test Business Function" pop-up menu item, which would generate a new page of BSFN testing code in E1S format - fill in the values you wish to pass in and click on the "!" button to execute the script. This will run the BSFN and then print all parameter values in the output pane.
On the other hand, we also have a dedicated BSFN testing tool - "Pok-Ta-Pok", which may be a more convenient way to do this, except that it would not have all the extras of OneAssist...