Tabular Form Unable to update : MRU error

Hi,
In debug mode, I got that message when I try to update the only row I have in that form :
0.08: Processing point: AFTER_SUBMIT
0.08: ...Process "ApplyMRU": MULTI_ROW_UPDATE (AFTER_SUBMIT) #OWNER#:PROMOTION_ASSIGNEE_PROD_TMP:PROMO_ASSIGN_PROD_SEQ:pro_no_promotion_assignee
0.09: Encountered unhandled exception in process type MULTI_ROW_UPDATE
0.09: Show ERROR page...
0.09: Performing rollback...
Error in mru internal routine: ORA-20001: no data found in tabular form
What can I do ?
Thank you.

The tabular form wizard creates a display report column for your primary key column in addition to the actual hidden column that stores the PK for MRU processing. To differentiate the display column from the hidden column, it gets a different alias by appending a suffix to the primary key column's name. That suffix plus the PK column name can't exceed 30 characters, and the suffix is 8 characters long, so this leaves 22 characters for the PK column name. Clearly this implementation has some room for improvement, and I expect that we'll address this in a future version of APEX.
Regards,
Marc

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Any comments, assistance, links, or even answers on the following situation would be much appreciated....
I have a Application Express 4.0 (Could upgrade to 4.1 if it would help this issue)
I have a wizard generated tabular form on a table, the form will show up to 600 records (rows) on a page.
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l_cks wwv_flow_global.vc_arr2;
j pls_integer := 1;
vUpdatedCount number := 0;
vErrorCount number:=0;
vMessage varchar2(4000):='';
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l_cks
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