Report suddenly showing ORA-20001: Error fetching column value: ORA-06502:

Hi,
Some reports in my applications are suddenly showing:
ORA-20001: Error fetching column value: ORA-06502: PL/SQL: numeric or value error: character string buffer too small
instead iof the data they used to show.
In my development system I can fix this by:
1. changing the column alias in my sql
select 'a' alias1 from dual becomes
select 'a' alias2 from dual
2. SAVE CHANGES
3. change column alias back to original
select 'a' alias2 from dual becomes
select 'a' alias1 from dual
4. reorder columns back to original in the 'report attributes' tab
alias1 is now at the bottom of my colum list - i just bounce it up to column 4 using the up arrows
5. SAVE CHANGES
then everything starts working OK again.
There seems to be nothing wrong with my sql as I can make it works on a new page or after I run the above steps, so I guess something is breaking somewhere but I cannot work out what.
Has anyone else seen this? Does anyone know the cause? Does anyone have a fix for this that does not involve the above steps (plus redeployment to prodcution and all the work that involves)?
I am seeing this on version 2.3 and 3.0.
Thanks,
Martin

Hi Scott,
I think this is want you want (sorry it's not easy to read):
wp.suite_id - Database Column NUMBER - Report Column Based on LOV
wp.project_id - Database Column NUMBER - Report Column Based on LOV
wp.application_order wp_order - Database Column NUMBER - Report Column Standard
lpad(wp.work_package_id,5,'0')||' - '||wp.name wp_name - Database Column NUMBER/VARCHAR2 - Report Column Standard
pt.application_order pt_order - Database Column NUMBER - Report Column Standard
pt.name pt_name - Database Column VARCHAR2 - Report Column Standard
substr(pt.description,1,30) description - Database Column VARCHAR2 - Report Column Standard
pt.application_tier - Database Column VARCHAR2 - Report Column Based on LOV
pt.application_method - Database Column VARCHAR2 - Report Column Based on LOV
pt.TECH_LEAD_ID - Database Column NUMBER - Report Column Based on LOV
This report has no link columns and no derived columns.
Regards,
Martin

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=================
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====================
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>
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Denes Kubicek
http://deneskubicek.blogspot.com/
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http://apex.oracle.com/pls/otn/f?p=31517:1
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Report suddenly showing ORA-20001: Error fetching column value: ORA-06502:

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