Setting default value to columns on tabular form is not working.

Hi,
I created a tabular form and i want to set some default values to columns based on the values in page items.
so i set the page item to column value in tabular form attributes by selecting the Default type as PLSQL Expression & Function DEFAULT value &P24_ISSUE_ID. it worked fine but
in the similar way i tried for the another column by selecting the default type as pl/sql expression & function and default value &P24_CASE_NAME.
but it throwing an error for this like failed to parse SQL query: ORA-00904: "C254DB": invalid identifier
i don't understand where i gone wrong even i checked for the data types of the columns, everything is fine.
so please help me out of this problem.

Tulasi 1243 wrote:
for the first column
i selected
DEFAULT TYPE as PL/SQL Expression & FUNCTION
Default as *&P24_ISSUE_ID.* This is a number data type column
2nd column
Default Type as PL/SQL Expression & Function
Default as *&P24_CASE_NAME.* This is Varchar2 data type column.The appropriate options for a default value from a page item are Item (application or page item name) for Default Type and the item name ( P24_ISSUE_ID, P24_CASE_NAME etc) for Default.
*&P24_ISSUE_ID.* is not a "PL/SQL Expression or Function".
but it throwing an error for this like failed to parse SQL query: ORA-00904: "C254DB": invalid identifierWhat you are doing results in the APEX engine substituting the P24_CASE_NAME value "C254DB" into the default value and then trying to evaluate this string as a piece of PL/SQL. Outside of a block in which it is defined as a variable, constant or function "C254DB" is not a valid PL/SQL expression.

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