Validation text always accompanies a validation rule (see Validation rule) for a database field and is displayed when that rule is broken. You will not be allowed to go to the next line of a table until you have entered data that is allowed by the validation rule. Only then will the validation text not be displayed. If you decide not to create your own validation text, Ability will generate a default message to tell the user what rule has been broken.
Note that in any line there may be several fields that have an attached validation rule and its accompanying validation text. In this case only one validation text at a time will be displayed. Once you have dealt with this by entering legitimate data into the appropriate field, it may still be the case that one or more of the other fields contains illegitimate data. Validation text will continue to be displayed, in turn, for each of the fields still containing illegitimate data, until you have dealt with all these fields.
Typical examples of validation text are:
Must be either Smith or Jones when the validation rule ="Smith" OR "Jones" is broken.
Must be either Smith or Jones or Blank when the validation rule ="Smith" OR "Jones" OR Is Null is broken
Number must be between 20 and 40 inclusive when the validation rule >="20" AND <= "40" is broken.
See: