APEX

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