Strange behaviour of Forms 10g

Question

The BUR trigger on a table in the DB, raises an application error whenever user tries to enter some invalid value in one of the fields in the form. ( the block is Database block, with query data source as Table).
So when the user enters a valid value in the field, the changes are saved in the database. But whenever an invalid value is entered, the form does nothing. Neither does it display the error message nor does it save anything (it should not save!).
I accidentally hit the space bar on my key board and the error message popped up.
The form level on-error trigger has following code -
    WHEN -20999 <= dbmserrcode AND dbmserrcode <= -20000 THEN
          SET_ALERT_PROPERTY(
               alert_is,
               alert_message_text,
               error_tools.get_oracle_error_desc(dbmserrtext)
            alt_num := SHOW_ALERT(alert_is);
            RAISE form_trigger_failure;Why is the the error message not displayed directly (without pressing any key) ?

Answer 1

You need to handle the database error in your Forms On-Error trigger. Check the value of the Forms DBMS_ERROR_CODE and DBMS_ERROR_TEXT variables to see if an error in the database has occured. I've seen BUR triggers on a table cause this type of behavior in a form if you are expliciltly handling the DBMS_ERROR_CODE in your On-Error trigger.
Hope this helps,
Craig B-)
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