IBM SC33-1683-02 - Manual (Page 405)

name4
The name of a 4-byte location that is to receive the current number of
active user tasks, expressed as a binary value.
(Rn) A register to receive the current number of active user tasks, expressed
as a binary value.
MXT_LIMIT(name4 | (Rn))
returns the current number of the MXT parameter.
name4
The name of a 4-byte location that is to receive the maximum number
of all user tasks currently allowed, expressed as a binary value.
(Rn) A register to receive the maximum number of all tasks currently
allowed, expressed as a binary value.
MXT_QUEUED(name4 | (Rn))
returns the current number of user transactions that are queued as a result of
the maximum tasks (MXT) being reached.
name4
The name of a 4-byte location that is to receive the current number of
queued user tasks, expressed as a binary value.
(Rn) A register to receive the current number of queued user tasks,
expressed as a binary value.
TCLASS_QUEUED(name4 | (Rn))
returns the current number of all transactions that are queued for transaction
class membership.
name4
The name of a 4-byte location that is to receive the current number of
queued transaction class members, expressed as a binary value.
(Rn) A register to receive the current number of queued transaction class
members, expressed as a binary value.
RESPONSE and REASON values for INQUIRE_MXT:
RESPONSE REASON
OK None
DISASTER LOGIC_ERROR
ABEND
LOOP
INVALID INVALID_FUNCTION
KERNERROR None
PURGED None
transaction management functions
Chapter 3. The user exit programming interface (XPI) 373