As you can see Nav won't accept any changes to table and hence cannot be validated. To overcome this there is a simple Solution Many of you may already Know this...
There is a Option in TOOLS---->Options-->Prevent Data Loss From Table Changes. As this is Set to Yes you were not able to change the Fields/ change structure of table.
So Set Prevent Data Loss From Table Changes To NO.
I got this same error in NAV 2017. To resolve it, do the following:
ReplyDelete1. Compile the object with the "Synchronize Schema...LATER". This will add the New Field to the table
2. Then Recompile the Object again, this time the "Synchronize Schema...Now - with validation"