Sense code 0801

Resource not available: The LU, PU, link station, or link specified in an RU is not available.

Bytes 2 and 3 following the sense code contain sense-code-specific information.
0000
No specific code applies.
VTAM® hint: Possible causes of this error include, but are not limited to, the following ones:
  • A CINIT request fails because an application rejects a terminal log on. Message IST663I is displayed when this error occurs, and the logon from the terminal fails with USSMSG07. See the information about common subarea network problems in z/OS Communications Server: SNA Diagnosis Vol 1, Techniques and Procedures for more information about this problem.
  • The logmode is incorrect.
  • The major node is not active for the resource. (A frequent reason for this error is that the NCP has not been activated.)
  • The line is inactive.
  • The line is a CALL=INOUT line over which simultaneous connections are being attempted (dial-in and dial-out). This is a temporary condition and the session might be tried again.
  • APPC=YES was coded on the APPL definition, and there is an attempt to establish the session using OPNDST.
  • With NTRI, this error can occur when DIALNO is incorrect.
  • For IMS, the LU might not be defined.
0001
Independent LU does not receive ACTLU: An ACTLU has been sent by the SSCP to an independent LU (sent by BF).
0002
Reserved resources requested for sessions exceed allowable maximum: The resource reservation request in RNAA exceeds the maximum allowed by system definition. The address was not assigned and no change was made to the current reservation of resources for the LU.
0003
Name aliasing cannot be performed because the name alias function is not available.
0004
A switched connection currently exists for the link being activated, and the SSCP or the subarea PU does not support the protocols necessary to allow takeover of such a link.
0005
A SETCV has been received for a resource that is still represented in the pool of available control blocks.
0006
The line is not associated with a line adapter, or the line is associated with a line adapter that is not valid for the genned usage tier.
0007
The line is associated with a line adapter that is not installed or not attached to the CCU.
0008
The line is associated with a line adapter that is inoperative.
0009
The LU is not available because it is not ready to accept sessions.
000A
The PLU is not available because it is being taken down or has issued SETLOGON with the OPTCD=QUIESCE. The PLU is, therefore, not accepting new sessions. The initiation request should not be tried again.

VTAM hint: If the PLU is TSO, then it is likely that the TSO USERMAX limit has been reached. If a MODIFY TSO,USERMAX=0 was issued, then all LOGON attempts for TSO will fail with this sense code.

000B
The PLU is not available because it is unable to comply with the PLU-SLU role specification.
000C
The SLU is not available because it is unable to comply with the PLU-SLU role specification.
000D
The LU is not available because its SSCP is in the process of being taken down, and is therefore not allowing new sessions to be started. The initiation request should not be tried again.

VTAM Information: When VTAM receives this sense code for a session initiation, it continues searching through the adjacent SSCP table until the destination LU is found or routing is exhausted.

VTAM hint: A possible cause of this error is that a dynamic application program is trying to open its ACB at the same time its SSCP is in the process of being taken down.

000E
The LU is not available because an intermediate gateway SSCP is in the process of being taken down, and is therefore not allowing new sessions to be started.
000F
The SLU is not available because it is being taken down, and is therefore not accepting new sessions. The initiation request should not be tried again.
0010
A switched subarea connection cannot be established because no switched subarea links are defined.
0011
Switched subarea connection to another network cannot be established because no switched subarea links are defined within a gateway NCP.
0012
An APPN connection cannot be established because this node has no available integers to represent a new TG.
0013
Switched connection cannot be established because a SHM GROUP was not defined in the switched PU's PATH definitions.
0014
A switched connection cannot be established. Call request verification was requested, but is not supported for this configuration. This condition results from conflicting system definition.
0015
The link connection is unavailable as a result of a hardware failure within the line adapter.
0016
A link resource is not available as a result of maintenance occurring on the supporting hardware.
0017
A link resource is not available because a mismatch exists within the microcode of the supporting hardware.
0018
Activation of the channel link failed because the supporting hardware is undergoing error recovery.
0019
Activation of the channel link failed because the supporting hardware is undergoing concurrent maintenance.
001A
Set aside for implementation-specific use, and will not be otherwise defined in SNA; see implementation documentation for details of usage.

VTAM hint: This sense code can be displayed in a VTAM message, but is set by another product. It might be an NCP sense code. See NCP V7R8, SSP V4R8, EP R14 Messages and Codes for a complete description.

001B
Set aside for implementation-specific use, and will not be otherwise defined in SNA; see implementation documentation for details of usage.

VTAM hint: This sense code can be displayed in a VTAM message, but is set by another product. It might be an NCP sense code. See NCP V7R8, SSP V4R8, EP R14 Messages and Codes for a complete description.

001C
Set aside for implementation-specific use, and will not be otherwise defined in SNA; see implementation documentation for details of usage.

VTAM hint: This sense code can be displayed in a VTAM message, but is set by another product. It might be an NCP sense code. See NCP V7R8, SSP V4R8, EP R14 Messages and Codes for a complete description.

001D
Set aside for implementation-specific use, and will not be otherwise defined in SNA; see implementation documentation for details of usage.

VTAM hint: This sense code can be displayed in a VTAM message, but is set by another product. It might be an NCP sense code. See NCP V7R8, SSP V4R8, EP R14 Messages and Codes for a complete description.

001E
Set aside for implementation-specific use, and will not be otherwise defined in SNA; see implementation documentation for details of usage.

VTAM hint: This sense code can be displayed in a VTAM message, but is set by another product. It might be an NCP sense code. See NCP V7R8, SSP V4R8, EP R14 Messages and Codes for a complete description.

001F
A link connection is associated with a protocol that is inoperative.
0020
A link resource is not available because of a mismatch between current operational parameters and the values specified at system generation.
0026
The PU is not available because the dependent LU server-dependent LU requester connection could not be established.
0027
A switched connection cannot be established because no switched link has been defined.

VTAM hint: A switched connection cannot be established because a GROUP was not defined in the switched PU's PATH definitions or the defined GROUP does not exist in any active NCP major node.

0028
REQDACTPU was received for a PU that is known but whose SSCP-PU session is currently inactive.
0029
A multipath channel connection cannot be established because the system level is not at least MVS™ 4.3.
002A
An ACTLINK has been received for a resource that is still represented in the pool of available control blocks.
002B
Resource is unavailable due to program or operator action. This sense code is returned by the DLU network node server when it performs resource verification reduction for a DLU in its domain which has registered itself as unavailable for an unexpired time.
002C
The required extended coupling facility is not available.
002E
Generic Resource exit indicated to fail this session.
4001
Line cannot be force deactivated while panel line test is active.
4002
A forced deactivate was attempted when wrap test was active.