-70: Session inactivity timeout (work rolled back)
Explanation:
Your transaction was implicitly cancelled and rolled back by an implicit <ROLLBACK statement>. The database session was implicitly terminated, since you failed to carry out any database operations within a certain period of time (installation parameter SESSION_TIMEOUT or TIMEOUT value specified with the <CONNECT statement>).
User Action:
Repeat the CONNECT statement, possibly specifying a higher TIMEOUT value.
It may also be necessary to check and modify the value of the SESSION TIMEOUT installation parameter.