Oracle Audio Technologies Oracle Tuxedo manual Error Handling, Exec Cics Link Programprereq

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Cli ent Applic ation Considerations

EXEC CICS LINK PROGRAM("PREREQ")

COMMAREA(&carea)

LENGTH(lmsg) RESP(resp) RESP2(resp2);

if(carea.CltHdr.ReturnCd carea.CltHdr.ReqReturnCd) process error;

else

successful call, returned data is in Request_data;

Note: C Programmers, do not include the NULL terminator on any strings. In the previous example, the memxxx calls were used instead of the strxxx calls. This example is typical when using C and CICS together. For more information see your C for CICS documentation.

Error Handling

You may encounter the following three types of errors while using TMA TCP for CICS:

zGateway errors (communications problems)

zMVS or CICS errors

zApplication errors

The following subsections explain how TMA TCP handles these different kinds of errors.

Gateway Errors

When local or remote gateway errors occur they are logged in the Oracle Tuxedo ULOG file on the remote Oracle Tuxedo node and in the BEALOG file (a TD Queue defined during installation) within the CICS region. All associated service requests fail and if the TMA gateways are able to communicate with each other, error messages are communicated between them.

MVS or CICS Errors

For requests originating in the Oracle Tuxedo domain, if the remote target system does not make it possible for TMA TCP for CICS to detect particular types of failure, the TMA TCP gateway (the Oracle Tuxedo domain) blocking time-out parameter can be tuned to provide timely

Oracle Tuxedo Mainframe Adapter for TCP - CICS User Guide

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Contents

Oracle Tuxedo Mainframe Adapter for TCP Page Contents Understanding How Oracle TMA TCP for Cics Works Configuring and Administering Oracle TMA TCP for Cics Vi OracleTuxedo Mainframe Adapter for TCP Cics User Guide Programming Oracle Tuxedo Mainframe Adapter for TCP Cics Error and Informational Messages What You Need to Know Introducing Tuxedo Mainframe Adapter for TCP CicsDomains-based Gateway Connectivity Oracle TMA TCP for Cics ArchitectureOracle TMA TCP Functionality Oracle TMA TCP for Cics Components TMA TCP for Cics Application Handler TMA TCP for Cics HandlerIBM TCP/IP Sockets for Cics Supplied Listener TMA TCP for Cics Pre-requesterTMA TCP for Cics Requester IBM TCP/IP Sockets InterfaceRequests from within an Oracle Tuxedo Domain Processing ScenariosTMA TCP for Cics Oracle Tuxedo to TMA TCP for Cics RoutingRequests from within Cics Oracle TMA Client Gateway Configuration Getting Started with TMA TCP for Cics Starting the Listener Program Understanding How Oracle TMA TCP for Cics WorksInitializing the Handler Processing Remote Service RequestsRunning Oracle TMA TCP for Cics Shutting Down the Handler Listing 2-1 Bdwn Command Line Syntax for Handlers Using Bdwn to Shut Down the HandlerShutting Down the Requester Starting the Requester ProgramListing 2-2 Bdwn Command Line Syntax for Requesters Using Bdwn to Shut Down the RequesterOracle Tuxedo Terminology Translating Data with TMA TCP gatewayField Type Translation Rules Data Translation RulesOracle Tuxedo Terminology Term DefinitionView Field Type/Length Remote Data Type DescriptionIncluding Null Characters in String Length Calculations Strings and Numeric Data a Closer LookService Request Processing with Security Configuring the TMA TCP SecuritySecurity Checking for Unix to Mainframe Transactions Security Checking from Unix to MainframeSecurity Checking for Mainframe to Unix Transactions Security Checking from Mainframe to UnixSecuring User Connections Setting Up Security for TMA TCP for CicsSecuring Inbound Services Securing Outbound Connections from Cics to IMS Securing Outbound Connections from Cics to UnixSecuring Outbound Connections from Cics to Cics Securing Outbound Services Configuring and Administering Oracle TMA TCP for Cics Menu Type Use Menu NavigationMain Menu Main Menu Beam Sub-menu Codes Area of Operation UsageMain Menu Beam Operation Codes Allowable Operation Enter This Code To Access This ScreenBrowse Requester Function Keys Definitions Update Connection Screen C2Connection Screens PF KeysField Name Description FieldsInquire Connection Screen C3 This name is the gateway ID. Specify a unique name up to Browse Connection Screen C5 Requester Screens Function Key Insert Requester Screen R1Configuring the TMA TCP Security section Used on the Oracle Tuxedo-side configuration. Coordinate Update Requester Screen R2 TMA TCP Security Cics Queue Name Inquire Requester Screen R3Is a unique name up to 16 characters. Example bankmach1 On the Oracle Tuxedo-side configuration. Coordinate with Delete Requester Screen R4 This name is a unique name up to 16 characters. Example An eight-character ID. This name must be the same ID Browse Requester Screen R5 Outbound Service Information Screens Function Keys Insert Outbound Service Information Screen S1Service name as it is known to the Cics programmer Update Outbound Service Information Screen S2 Inquire Outbound Service Information Screen S3 Delete Outbound Service Information Screen S4 This name is a symbolic name as it was defined on the Delete User Connection Account Screens Browse Outbound Service Information Screen S5Insert User Connection Account Screen U1 Update User Connection Account Screen U2 Inquire User Connection Account Screen U3 Delete User Connection Account Screen U4 Browse User Connection Account Screen U5 Inbound Service Information Screens Insert Inbound Service Information Screen Service name as it is known in the remote Oracle Tuxedo Cics section Update Inbound Service Information ScreenFields TCP Cics section Inquire Inbound Service Information ScreenFields Delete Inbound Service Information Screen Fields Message results Browse Inbound Service ScreenHandler Configuration Screens Update Handler Configuration Screen H2 Inquire Handler Configuration Screen H3 Fields Modifying User Connection Accounts Dynamically Configuring TMA TCP for CicsModifying Outbound Services Deleting Requester LMIDs Administering the GatewaysModifying Connections Oracle Tuxedo Mainframe Adapter for TCP Cics User Guide Client Application Considerations Buffer Layout IssuesListing 5-2 C Structures Making Calls from a Cics Client ProgramListing 5-1 Cobol Record Request Codes Return Codes Value Listing 5-3 Cobol Cics Client Program Example ExamplesListing 5-4 C Cics Client Program Example Exec Cics Link Programprereq Error HandlingServer Application Considerations Application ErrorsModifying the Length of the Return Message Programming Services with a ResponseProgramming Services without a Response Oracle Tuxedo Mainframe Adapter for TCP Cics User Guide Message Description Messages Returned to the Remote GatewayDisconnect process has completed successfully Messages Written to the TMA TCP for Cics Log Password specified in the TMA TCP gateway configuration File control function with the Fgetfl option failed Handler is verifying that the account and password codes Connection already exists Codes Returned to a Cics Client ProgramValue Lmid Message Description Action Data Field Error MessagesInformational Process Messages Entered is not valid MAX MSG Size entered is Enter a valid MAX MSG Size i.e System Error Messages Invreq