Invalid Enumeration Value

I am trying to use the Excel Add In to update Height, Width and Depth on records in the InventTable using Dynamics AX 2012 Feature Pack.  These are already existing item numbers.  I am trying to add in the height, width, depth values. 

I have connected to the server, added the InventTable, selected Item Number, Product.ProductNumber and just the Height field for testing.  I filtered on one item number, selected Refresh all and the values below populated.

The problem I don't understand is when I try to change the height value from 20 to 30 and select Publish All I get a pop up that says Inavlid Enumeration Error.

Anyone know why this error is happening and how I can correct it? 

Thanks in advance for any help!

Lynn Litzau