ORA-06502 in the Tree Report

Question

I am encountering the following error on my Tree report occasionally. "Unexpected error ORA-06502: PL/SQL: numeric or value error: character string buffer too small". Apex version 3.x (I think not sure), Database 10.1.0.4
I have noticed that I can keep on expanding nodes a couple of times and then suddenly I get error. After I logoff and logon again, I can get tree displayed and then after few expands I receive the error. I have reduced MAX LEVEL from 5 to 1. Here is the query and the table:
select "METHOD_ID" id,
"P_METHOD_ID" pid,
method_id || ' : ' || P_method_id || ' : ' ||
PROJECT_NAME || ' : ' ||
package_name || ' : ' ||
class_name || ' : ' ||
method_name name,
'f?p=&APP_ID.:10:&SESSION.::NO::GLB_METHOD_ID:'||"METHOD_ID" link,
null a1,
null a2
from java2java_usedby h .
The table java2java is:
CREATE TABLE JAVA2JAVA_USEDBY
METHOD_ID NUMBER(15) NOT NULL,
PROJECT_NAME VARCHAR2(200 BYTE),
COMPONENT_NAME VARCHAR2(200 BYTE),
PACKAGE_NAME VARCHAR2(200 BYTE),
CLASS_NAME VARCHAR2(200 BYTE),
METHOD_NAME VARCHAR2(200 BYTE),
P_METHOD_ID NUMBER
NOLOGGING ;
CREATE UNIQUE INDEX JAVA2JAVA_USEDBY_U1 ON JAVA2JAVA_USEDBY
(P_METHOD_ID, METHOD_ID)
NOLOGGING;
This table allows a row to have multiple parents. So for a given method_id, there could be more than one p_method_id.
Method ID values are 10-12 digits

Answer 1

Vasant - It would be ideal if you could show this problem on apex.oracle.com.
There was an error with similar symptoms reported and discussed here: Tree error, after Expand All, then collapsing any node, ORA-6502/6512 , so if you could determine the version of Application Express you are using that might be useful.
Scott