go to Manage | Database | Fields and find the field definition for the operation / exercise field. Double click it to open the Field Options dialog. On the validation tab, you'll find an option for limiting the value of the field to being the member of a designated value list.
It works for me.
I found the field in Manage | database | fields
Set a validation limiting values in the field to the value list.
When I then enter DDDDD in the field, I get a validation error message.
I am confused??
It does not work for me.
Just to be sure, that we are doing the same thing, I have attached a screen-shot of the Deployment Details Portal in the Personnel Layout. I have highlighted using a red rectangle the field that I am having problems with regards data validation.
Is this the same field you used?
Yes, that's the one.