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AR932 OCL

Let’s break down the provided A/R Fuels Customer Maintenance program, which is written in Operation Control Language (OCL), commonly used on IBM midrange systems like the IBM System/36. OCL is a job control language used to define and execute programs, manage files, and control job flow. The program snippet provided appears to be part of a batch process for maintaining customer data in an Accounts Receivable (A/R) system for a fuels-related application.

Below, I’ll explain the process steps of the OCL program, identify the external programs called, and list the tables (files) used, based on the provided code.

Process Steps of the RPG .OCL Program

The OCL code provided is a control script that sets up the environment and executes a program, likely written in RPG (Report Program Generator), a language commonly used with OCL on IBM systems. Here’s a step-by-step explanation of the process:

  1. Program Invocation (// CALL PGM(GSGENIEC)):
  2. The CALL statement initiates the execution of a program named GSGENIEC.
  3. This is likely a utility or initialization program that sets up the environment or performs a prerequisite task for the A/R Fuels Customer Maintenance process.

  4. The exact functionality of GSGENIEC is not specified in the code, but it could handle tasks like validating the environment, checking user permissions, or preparing data for subsequent steps.

  5. Conditional Check (// IFF ?L'506,3'?/YES RETURN):

  6. The IFF (If) statement checks a condition using a system variable or parameter ?L'506,3'?.
  7. The L likely refers to a local data area or a system variable at position 506, with a length of 3 characters.
  8. If the condition evaluates to YES (true), the program executes the RETURN command, which terminates the OCL procedure immediately.

  9. This acts as a gatekeeper, ensuring that the rest of the program only runs if the condition is false (e.g., a specific status or flag is not set).

  10. Procedure Call (// SCPROCP ,,,,,,,,?9?):

  11. The SCPROCP command appears to invoke a system procedure or a subroutine, passing parameters.
  12. The commas (,,,,,,,,) indicate placeholder parameters, and ?9? is a substitution variable (likely a parameter passed to the procedure, such as a library or file identifier).

  13. The exact purpose of SCPROCP is unclear without more context, but it might set up additional environment settings, call a subroutine, or perform a system-level operation.

  14. Environment Setup (// GSY2K):

  15. The GSY2K command is likely a custom or system-specific command related to Year 2000 (Y2K) compliance or date handling.
  16. It may initialize date-related settings or ensure that the system handles dates correctly (e.g., using a four-digit year format).

  17. This step ensures the program operates in a Y2K-compliant environment, which was critical for older systems processing dates.

  18. Program Load (// LOAD AR932):

  19. The LOAD statement loads the main program, AR932, into memory for execution.
  20. AR932 is likely an RPG program responsible for the core A/R Fuels Customer Maintenance logic, such as updating customer records, processing fuel-related transactions, or generating reports.

  21. This step prepares the system to run the actual business logic.

  22. File Definitions:

  23. The FILE statements define the files (tables) that the AR932 program will use. Each file is associated with a specific dataset and access mode:
    • FILE NAME-ARFUEL,LABEL-?9?ARFUEL,DISP-SHR:
    • Defines a file named ARFUEL (likely the A/R Fuels file).
    • The LABEL-?9?ARFUEL specifies the file’s label, where ?9? is a substitution variable (e.g., a library or prefix like QSYS/ or a specific library name).
    • DISP-SHR indicates the file is opened in shared mode, allowing multiple programs or users to access it concurrently.
    • FILE NAME-ARCUST,LABEL-?9?ARCUST,DISP-SHR:
    • Defines a file named ARCUST (likely the A/R Customer file).
    • Similar to ARFUEL, it uses a substitution variable for the label and is opened in shared mode.
    • FILE NAME-ARCONT,LABEL-?9?ARCONT,DISP-SHR:
    • Defines a file named ARCONT (likely the A/R Control file, which may store configuration or summary data).
    • Also uses a substitution variable and shared mode.

  24. These files are critical for the AR932 program to read or update customer and fuel-related data.

  25. Program Execution (// RUN):

  26. The RUN statement executes the loaded AR932 program.
  27. This is where the actual customer maintenance logic is performed, using the files defined above (ARFUEL, ARCUST, ARCONT).
  28. The program likely performs tasks like adding, updating, or deleting customer records, processing fuel transactions, or generating maintenance reports.

External Programs Called

The OCL program explicitly calls the following external program: 1. GSGENIEC: - Called via // CALL PGM(GSGENIEC). - Likely a utility or initialization program that performs setup tasks before the main logic.

Additionally, the main program executed is: 2. AR932: - Loaded and run via // LOAD AR932 and // RUN. - This is the core RPG program responsible for A/R Fuels Customer Maintenance.

The SCPROCP command may also invoke a system procedure or subroutine, but it’s unclear whether this is a distinct program or a system function. Without further context, I’ll treat it as a system-level operation rather than a named external program.

Tables (Files) Used

The program uses the following files (tables), as defined in the FILE statements: 1. ARFUEL: - Likely contains fuel-specific accounts receivable data, such as fuel purchase records, transaction details, or billing information for fuel customers. - Label: ?9?ARFUEL (with ?9? as a substitution variable for the library or prefix). - Access mode: Shared (DISP-SHR).

  1. ARCUST:
  2. Likely the customer master file, storing customer details such as account numbers, names, addresses, and credit information.
  3. Label: ?9?ARCUST.

  4. Access mode: Shared (DISP-SHR).

  5. ARCONT:

  6. Likely a control file containing configuration data, summary totals, or control parameters for the A/R system (e.g., batch numbers, processing flags, or system settings).
  7. Label: ?9?ARCONT.
  8. Access mode: Shared (DISP-SHR).

Summary

  • Process Steps:
  • Calls GSGENIEC to initialize or validate the environment.
  • Checks a condition (?L'506,3'?) and returns if true, halting further execution.
  • Invokes SCPROCP with a parameter (?9?), possibly for system setup.
  • Sets up Y2K compliance with GSY2K.
  • Loads the main program AR932.
  • Defines three files (ARFUEL, ARCUST, ARCONT) for use by AR932.

  • Runs AR932 to perform customer maintenance tasks.

  • External Programs Called:

  • GSGENIEC (initialization utility).

  • AR932 (main RPG program for A/R Fuels Customer Maintenance).

  • Tables (Files) Used:

  • ARFUEL (fuel transaction data).
  • ARCUST (customer master data).
  • ARCONT (control or configuration data).

If you have additional details about the system (e.g., IBM System/36 specifics, the purpose of GSGENIEC, or the SCPROCP command), I can refine the explanation further. Let me know if you need more analysis or clarification!