CREOSON attached to button in creo causes it to hang

Curious if, there is a way around this. 
I have a custom command, that should upload data into a 3rd party system. I've got this working with CREOSON and it's tested working in my IDE

Now that I have attached this code to a button command in creo, it causes it to hang when I reference my open assembly
I am able to get a session ID to creoson, but when I run the command bom : get_paths causes it to hang.

Is this a limitation with creoson? I assume there is some resource that is occupied during the OnMethod that stops CREOSON from responding