Possible Fixed-Point and U64 addition bug

[TomOrr0W]

When adding a fixed-point number to a U64 with the output configured to be a U64, the result is either 1 higher or 1 lower than expected depending on the rounding settings.  See snippet below for demo.  I tried this in both LabVIEW 2015 and LabVIEW 2017 with the same result for each.

Edit: Attached Snippet due to snippets not downloading correctly.

[CaseyGj]

Thank you for the nice snippet showing all the examples!

You are right. That doesn't seem like correct behavior to me either. I'll look into this and possibly file a bug report for you on this problem.

[TomOrr0W]

I contacted NI Support to get a CAR for the issue.  The CAR is 684427.