Trouble with NETFILE

I've tried 3 times now to NETFILE my taxes for this year and this error message keeps popping up:

 

CRA result code: 35

The Canada Revenue Agency's processing system prevent your return from being accepted for NETFILE. For you to receive all the benefits and deductions to which you are entitled and to verify our validations, the Canada Revenue Agency needs you to file a paper return and attach all pertinent slips and receipts. The Canada Revenue Agency regrets the inconvenience.

 

I've tried 2 different browsers and it's still showing the same message. Please help!