This message is the first in a group of messages that VTAM® issues when an identification exchange (IDX) device failed to initialize. A complete description of the message group follows.

IST1650I    IDX INITIALIZATION FAILED FOR trlename DEVICE device_number CODE code
IST1651I    IDX RECEIVED BY VTAM:
IST1574I    offset hexdata_1 hexdata_2 hexdata_3 hexdata_4 EBCDIC_data
⋮
IST1574I    offset hexdata_1 hexdata_2 hexdata_3 hexdata_4 EBCDIC_data
IST1652I    IDX SENT BY VTAM:
IST1574I    offset hexdata_1 hexdata_2 hexdata_3 hexdata_4 EBCDIC_data
⋮
IST1574I    offset hexdata_1 hexdata_2 hexdata_3 hexdata_4 EBCDIC_data
IST314I  END

VTAM issues this message while processing an OPENPATH request unit when initializing an identification exchange (IDX) with a device, such as the IBM® S/390® Open Systems Adapter or a HiperSockets™ (iQDIO) adapter.

• The trlename value is the name of the device, as defined on the TRLE definition statement in the TRL major node or dynamically created in the ISTTRL major node.
• The device_number value is the hexadecimal address of the WRITE or READ subchannel, as defined on the WRITE or READ operand on the TRLE definition statement in the TRL major node.
• The code value is a 1-byte hexadecimal value that indicates the reason that the device failed to initialize. The code value is one of the following:
  • If the code value is less than X'80', it is a code that is generated by the OSA or the HiperSockets adapter. See the OSA IDX failure return codes information in zEnterprise System and System z10 OSA-Express Customer's Guide and Reference for a description of the failures generated by the OSA. Contact the IBM Software Support Center for failures generated by the HiperSocket adapter.
  • If the code value is greater than or equal to X'80', then that code is byte 3 of a data link control (DLC) status code that describes the error. Byte 2 of the DLC status code that describes this type of error is X'40'. Together, bytes 2 and 3 of a DLC status code form the completion code. For example, if code is X'80', this error is documented as completion code X'4080'. See the completion code information in z/OS Communications Server: IP and SNA Codes for a description of the completion code.

IST1574I

• This message displays the IDX received from (if preceeded by message IST1651I) or sent to (if preceded by message IST1652I) the IDX device.
• offset is the hexadecimal offset in the IDX.
• hexdata_1, hexdata_2, hexdata_3 and hexdata_4 each display 4 bytes of the IDX in hexadecimal format.
• EBCDIC_data displays 16 bytes of the IDX in EBCDIC format. Unprintable characters are represented by periods.

IST1651I

• This message is a header for the information displayed in message IST1574I for the IDX received from the IDX device.

IST1652I

• This message is a header for the information displayed in message IST1574I for the IDX sent by VTAM to the IDX device.