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why the data not pupulated on the form?

I have a base table "license" for two blocks - block ABC and block EFG. The master block is ABC and the detail block is EFG, they are linked to a ID

there is a button from block ABC to open block EFG
when I query a id from base table, there is a record returned
when I click on the button on block ABC to open block EFG for that id, I can see only partial data shown on block EFG, not all of them
I insert a debugging message like below into new-block-instance
    fnd_message.set_string( ' student id is: '  || to_char(:school.expiration_date));

I don't see data on expiration_date shown on the EFG form for that id. I don't know why. But the base table is shown this data when I query it from back-end.

Do you know why? and how to debug it? how to debug more?

I am using oracle 8i

1 Solution
Helena Markováprogrammer-analystCommented:
At first, I think that here is missing format:
fnd_message.set_string( ' student id is: '  || to_char(:school.expiration_date,'dd.mm.yyyy'));
(Also it is ID and not expiration_date in the string  ' student id is: ' there).

I think that this question is about Oracle Forms.
Is there a master-detail relation between 2 blocks ? If yes then I think that there is no need of using button for going to the second form. Also check the relation if it is really based on ID.

If there is no relation then check the where condition of second block and put test messages to the When-Button-Pressed trigger of button. I think that there is execute_query there in the code.
wasabi3689Author Commented:
I found the answer by myself. The bug is there is a duplicate statement in the trigger. After I removed it, it works
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