Will it convert for Efiling but not file?  or does it fail conversion?

The return converts and says it is ready for e-filing.  When you try and e-file the return, a failure to transmit comes up but no error message.  I have unchecked the enable error conversion checking box but it made no difference.  The same message comes up  "Return not transmitted".  Could the problem be with the State?

Thanks

Interesting, I havent noticed anyone else complain about this type of situation for CO. 

You may want to try using REFRESH Updates from the Updates drop down menu, just in case an update didnt install properly and it causing the issue.