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It seems that you creating your block based on stored procedure
Here's Metalink solution:
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Getting FRM-10095: Assertion Failed in iewbdbc_oracle_to_id [iD 118206.1]

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Modified 17-MAY-2006 Type PROBLEM Status PUBLISHED


Problem Description
-------------------

Try to create a form based on a stored procedure, having a Boolean or rowid
parameter.


With Forms 6.0.8.8 on NT
FRM-10095: Assertion failed in iewbdbc_oracle_to_id,
at E:\f994w32\src\ie\iewbdb.c:693

With Forms 6.0.8.10 on NT
FRM-10095: Assertion failed in iewbdbc_oracle_to_id,
at E:\f994w32\src\ie\iewbdb.c:695

With Forms 6.0.5.35 on NT
FRM-10095: Assertion failed in iewbdbc_oracle_to_id,
at E:\f992w32\src\ie\iewbdb.c:663

With Forms 6.0.8.8 on Sun
FRM-10095: Assertion failed in iewbdbc_oracle_to_id, at iewbdb.c:701

With Forms 6.0.8.8 on Digital Unix
FRM-10095: Assertion failed in iewbdbc_oracle_to_id,
at /m/if_src_17src/ie/iewbdb.c:701

With Forms 10.1.2.0.2
FRM-10095 assertion failed in iewbdbc_oracle_to_id,
at c:\myade\9i2\src\ie\iewbdb.c:722


While trying to create a database block on the table with the column having a
datatype timestamp , the following error is observed.

FRM-10095:Assertion failed in
iewbdbc_oracle_to_id, at c:\forms\1012\src\ie\iewbdb.c:724


or

FRM-10095: Assertion failed in
iewbdbc_oracle_to_id, at E:\f021w32\src\ie\iewbdb.c:715

Solution Description
--------------------

As workaround, convert the parameter into Varchar2 or number.

or

Create a table with date datatype and insert the value in time stamp format.

Explanation
-----------

The problem is BOOLEAN,ROWID,TIMESTAMP data types.
It works well with VARCHAR2, NUMBER, LONG, DATE, RAW, LONG RAW, CHAR.