Add information to error message in STD.File.Copy

We had a bug which meant an invalid destinationLogicalName parameter was passed to STD.File.Copy. The error message was " System error: 0: [20052: 2019-01-09 10:08:46 GMT: invalid destination filename]". Would you be able to add the invalid name to the error message so things like this are easier to track down?

Also (if you don't mind me tacking on a question to an improvement ticket ), the failmessage was "Failure: [20052: 2019-01-09 10:08:46 GMT: invalid destination filename] (in item 44)", how do I work out what item 44 is?