convert lat long to utm

[GisMapping]

Hello, I have my lat long in my attribute table but I need it converted to UTM for our records since we don't use lat/long. I tried this conversion tool but keep getting an unspecified error and I don't know what I am doing wrong. The lat/long values were added to the attribute table using " Add XY Coordinates" tool so they should be correct. Does anyone know why this might be happening? Thanks.

[GisMapping]

Even when I use the "calculate geometry attributes" tool it will calculate everything except UTM. Gives me an error and won't do UTMs using any tool....I am lost!

[NobbirAhmed]

Could you please share your data (or a slice of it)? I would like to test. Please send data to nahmed@esri.com

[GisMapping]

I have sent you an email with the FGDB.

[DavidPike]

Are you sure you have decimal degrees? Would add xy coordinates not just give x y values of the web Mercator? Try calculate geometry on a new field for the lat longs then run the tool?