A newbie developer here... thx in advance for all your help!
I am trying to set up eclipse for salesforce. Keep getting this error on Eclipse Mars.1 and Eclipse Kelper.
[Unable to update project properties:
Element {urn:partner.soap.sforce.com}returnFieldDataTypes invalid at this location]
other info: Prior to this, I just setup github and imported project on Eclipse. I'm using Mac OSx el capitan version 10.11 Beta (15A279b) 64
Feel free to ask any Qs that might help fix the problem.