question

The await keyword returns a coroutine to the calling function if the awaited function cannot be immediately finished. To get a coroutine back and await on it, we added a treenode.coevaluate() method.

If you await from a user command, then the calling function can't get that returned Coroutine object directly in order to await on it. The calling function needs to call treenode.coevalute() instead of simply executing the user command directly.

From the Custom Code activity's code, you need to pass the returned Coroutine back to the Custom Code activity so that it can block the token from progressing until that function returns a value that isn't a Coroutine.

Currently in FlexSim 22.1, to await on the execution of a user command, you would need to call coevaluate on its node rather than calling the command directly:

treenode commandNode = Model.find("Tools/UserCommands/command1/code");
await commandNode.coevaluate(token);

I'll add a case to the dev list to consider the implications of changing user command execution into coevaluation so that instead you could simply "await command1(token);" from the Custom Code activity's code.