When an error code between 0x0051 and 0x0054 inclusive is caught by MCError, the application throws two exceptions before crashing. The first is MCError: <exception str() failed>, and the second is the cause of the nested error, TypeError '>=' not supported between instances of 'str' and 'int'.

I have an incoming PR that I'll link to this issue that I believe fixes the bug, but I don't have a PLC to test against.

My solution handles both ints and strings, though I'm fairly certain only strings will be passed down, I just can't confirm that myself and there's an explicit str cast on errorcode.