The issue is you are attempting to execute via the string method on a restricted process. Instead try the functional execution method - see example shown in spoiler tag above in my previous reply. You can also see it mentioned here in the IPC workshop with some examples for you to try.
Hi this is by design as mentioned further up in the file.
You will only be able to run the two available APIs via the handle to 5010 - this is how most reference data services would be in the real world as a security measure.
Thank you for letting me know! However, I tried calling the first API method, and it still did not work (screenshot attached). I have looked over the IPC workshop, but I still do not understand what is not working.