Crash when generating invalid parameter error message

[LourensVeen]

Describe the bug
When trying to set a parameter on a code that does not have that parameter, AMUSE tries to generate a clear error message to raise, but crashes when doing so, resulting in a difficult-to-understand exception being raised instead.

To Reproduce
Set a parameter on a code that does not have it.

Expected behavior
An exception raised with clear error message along the lines of "code X does not have parameter Y".

Additional context
Reported by @cconroy20 in #1004. See my comments there on where the bug is. We still need to figure out if we can get the name of the code, and if so, how.