FRM-30457: Maximum Length ignored for character-datatype

Hi,
I have a oracle form. When i use Compile Module (Ctrl + T) I am getting the following error:
FRM-30457: Warning: Maximum Length ignored for character-datatype subordinate mirror item MAIN_CONTROLS.DATA1.
Can anyone help to resolve this warning message?

Hi,
Check the data type of MAIN_CONTROLS.DATA1, i think, it must be a number.
Or you might have not added the maximum length for MAIN_CONTROLS.DATA1.
I found the below when I surfed.
Error Message: FRM-30457: Warning: Maximum Length ignored for character-datatype subordinate mirror item %s.%s.
Error Cause:
A non-zero value was specified for the Maximum Length property in a subordinate mirror item whose Data Type is CHAR, ALPHA, or LONG. The Maximum Length property for such an item will be obtained from the master mirror item (the item specified by the Synchronize with Item property).
Action:
Specify the Maximum Length property in the master mirror item.

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