Error 999999 when using Classify Objects Using Deep Learning

ScarletMaguire

I am trying to run the Classify Objects Using Deep Learning tool but the 999999 error keeps appearing, along with some other messages (see in screenshots below). I have ran this same model before with no problems and I have even tried re-running it with previous input features that have worked in the past.

If anyone has any suggestions on what may be causing this, it would be greatly appreciated.

 

RTPL_AU

@ScarletMaguire 
More often than not that error is caused by something in a dataset name or path such as too many characters in the path (those DEEP project management generated network paths...) or funny characters ($%&* etc) in a name.
Depending on what you're doing it may be that there is something in a field name, attribute, etc - especially if it isn't an Esri native file (CSV, Excel).

It is a bit of a catch-all error that can be caused by many other things too but checking your names & paths is a good start. 
It may take copying stuff to a local drive with short names to rule it out.