I'm getting the same message as well and I am at wits end trying to figure it out...

I believe i found it.   Compare your federal AGI from the 1040 to the AGI on 40 N.   Mine is off due to rounding on capital gains.   Its adding an additional dollar.   

I appreciate the help.  I found that it rounded incorrectly as well.  I just haven't found the right way to correct it.  

Thank you so much. I put in a rounding adjustment to match it to the federal AGI and it filed fine after.

I am also having this problem. Where in the OR 40N return  did you put the rounding adjustment?

Thank you in advance for your help!

In the federal column of "Other adjustments to Income Smart Worksheet", Line E "Any other adjustments to income reported". Should be under line 26 in proseries. 

I changed it in the Allocation worksheet in Oregon.  I had to override the capital gain or loss amount for federal.

Hope that helps.

Mary