When VTAM® Exit Services returns control to the session management exit, register contents are as follows:

Registers 0–14:

Restored to entry contents.

Register 15:

Return code:

X'00'

VTAM Exit Services successfully performed the requested function.

X'04'

Input provided by the session management exit to VTAM Exit Services was not valid.

X'08'

A function which was not valid or supported was requested from VTAM Exit Services (for example, the function code in the VTAM Exit Services parameter list represents a function which is not valid, or is not supported by the current level of VTAM Exit Services).

X'0C'

VTAM Exit Services was unable to perform the requested function due to an internal (VTAM) error.