error 01003-no statement parsed

Hi,
I am getting the error 01003-no statement parsed
whenever trying to commit the data. This errors comes only when there are lot of users logged in and are doing large transactions.
The explanation of this error says that a cursor should be associated with an sql statement. I donot get this error in the normal days but only when there are more users...
Can anyone explain!!!

I wonder is increasing the parameter open_cursors in the init.ora would help. Increase this parameter, bounce the db, and retry.