To absorb a difference in specification related to exception processing between before and after a system update, without involving a program modification.

A method includes: referring a new-specification exception processing object to an exception information table 17, storing the new-specification exception processing object in the corresponding old-specification exception processing object and transmitting it to an old-specification second module 12, when exception processing occurs in a post-update system; referring an old-specification exception processing object to the exception information table 17, storing the old-specification exception processing object in the corresponding new-specification exception processing object and transmitting the new-specification exception processing object to a new-specification third module 14, in a case where the received exception processing object is received from the old-specification second module 12; extracting the old-specification exception processing object stored by the new-specification exception processing object and transmitting the old-specification exception processing object to the old-specification second module 12, in a case where the received exception processing object is received from the new-specification third module 14.