Many thanks.

I verified the data integrity and it was fine.

The problem is that the check entry form itself no longer has a column for Class.

I am still able to enter the Class as follows:

After entering the amount in the check breakdown I tab twice, this takes me to the invisible column where I can enter the Class. I cannot see what I am typing but it is being entered. If the Class doesn't exist then I am prompted to create a new one as before.

I can check later that the Class has been correctly entered.

Also previously there were two buttons under the check:

New Check

Save and Exit

These buttons also are now missing.

The workaround here is to SAVE the check at the top of the window and then close the process/ window with the top right "X".

I have tried minimizing and maximizing the window and minimizing the column on the left. Still can't get these items to appear.

So very bizarre.