I am trying to convert a .geojson file to a feature class. The 'JSON to feature' tool does not even recognize the .geojson file as a valid input file. Is there a preprocessing step I need to perform?
Take a look at this thread:
Converting geoJson to shapefile
It looks like a similar issue that you're having with similar output errors. There are a couple of suggestions on how to get around this. I hope this helps.
What Desktop client and version are you using?
Retrieving data ...