Oracle raise ORA-03113 when connect to a remote oracle server using toad

Question

Hi there,
when i use the tool toad connect to a remote oracle server which located in a different city,
when i submit a query in toad,
if the query returns many rows of data, it will raise the error ORA-03113：end-of-file on communication channel,
however if the query returns only a few rows, i won't raise such error,
however, when i use sqlplus connect to that remote server, it won't raise such error,
what's the reason is, can any one tell me how to tackle this problem if using the tool toad. thanks/

Answer 1

hi my oracle vsersion is:
SQL> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for Linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
my oracle server is 2 nodes rac server,
and i've tried two different kind version of toad v9.6 and v10.5, and both have the same problem
once i query a table, if the result returned more than 30 rows, then it will raise that error, if query returns less than 30 rows, it's ok.
i assume it is a problem concern with network, but i don't know why no such error raise when using sqlplus ?