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AR300P OCL

The provided document is an OCL (Operation Control Language) program, specifically AR300P.ocl36.txt, which is used on IBM midrange systems (like AS/400 or IBM i) to control the execution of programs and manage file operations. OCL is typically used to define job steps, invoke programs, and handle file processing in RPG (Report Program Generator) applications. Below, I’ll explain the process steps of this OCL program, identify the external programs called, and list any tables or files referenced.

Process Steps of the AR300P OCL Program

  1. Comment Block:

  2. ** MONTHLY STATEMENTS **:

    • This is a comment indicating the purpose of the program, likely related to generating monthly statements for accounts receivable (AR).

  3. Program Invocation:

  4. // CALL PGM(GSGENIEC):

    • The OCL script starts by calling an external program named GSGENIEC. This program is likely a utility or initialization program, possibly for setting up the environment or performing prerequisite checks before the main processing begins.
    • No parameters are explicitly passed to GSGENIEC in this call.

  5. Conditional Check:

  6. // IFF ?L'506,3'?/YES RETURN:

    • This is a conditional statement checking the value of a substitution expression ?L'506,3'?. This likely refers to a system or job variable (e.g., a local data area or parameter) at position 506 for 3 characters.
    • If the condition evaluates to YES (true), the OCL script executes a RETURN, which terminates the OCL procedure immediately, preventing further execution.
    • This acts as a gatekeeper to ensure certain conditions are met before proceeding.

  7. Procedure Invocation:

  8. // SCPROCP ,,,,,,,,?9?:

    • This invokes a procedure named SCPROCP. The commas indicate placeholders for parameters, and ?9? is a substitution variable, likely representing a parameter such as a library, file, or job-specific value.
    • The exact purpose of SCPROCP is not clear from the OCL alone, but it could be a system procedure for setting up the environment or preparing data for the main program.

  9. Local Variable Initialization:

  10. // LOCAL BLANK-*ALL:

    • This command initializes all local data areas (used for passing data between programs or jobs) to blanks. This ensures a clean slate for any variables used in subsequent steps.

  11. Date Conversion Utility:

  12. // GSY2K:

    • This invokes a system utility or command named GSY2K, likely related to Year 2000 (Y2K) date handling. It may convert or validate dates to ensure compatibility with two-digit or four-digit year formats, which was a common requirement in older systems.

  13. Switch Setting:

  14. // SWITCH 0XXXXXXX:

    • This sets a job switch (a set of 8 binary flags) to 0XXXXXXX. The first switch is set to 0, and the remaining switches (2–8) are unspecified (X), meaning their values are not explicitly set here and may retain their previous state or default to a system-defined value.
    • Job switches are used to control program flow or conditional logic in RPG or OCL.

  15. Program Load:

  16. // LOAD AR300P:

    • This loads the main RPG program named AR300P into memory for execution. This is likely the core program responsible for generating the monthly statements.

  17. File Declaration:

  18. // FILE NAME-ARCONT,LABEL-?9?ARCONT,DISP-SHR:

    • Declares a file named ARCONT to be used by the program.
    • LABEL-?9?ARCONT indicates that the file’s label (or dataset name) is constructed using the substitution variable ?9? concatenated with ARCONT. For example, if ?9? is a library name like PROD, the file might be PROD.ARCONT.
    • DISP-SHR specifies that the file is opened in shared mode, allowing multiple jobs or programs to access it concurrently (read-only or with appropriate locking).
    • This file is likely the accounts receivable control file containing data needed for statement generation.

  19. Program Execution:

    • // RUN:
    • Executes the loaded program (AR300P). This is where the main processing for monthly statements occurs, using the ARCONT file.

  20. Switch Check and Cancellation:

    • // IF SWITCH1-1 CANCEL:
    • Checks the state of the first job switch (set earlier to 0 in SWITCH 0XXXXXXX).
    • If the first switch is 1 (which would indicate an error or specific condition set by AR300P or a prior step), the job is canceled, terminating the OCL procedure.
    • Since the switch was initially set to 0, cancellation would only occur if AR300P or another step modifies the switch.

  21. Second Procedure Invocation:

    • // AR300 ,,,,,,,,?9?:
    • Invokes another procedure named AR300, again with ?9? as a parameter.
    • This could be a follow-up procedure to handle post-processing tasks (e.g., cleanup, logging, or additional report generation).
    • The commas indicate placeholders for parameters that are either unused or defaulted.

  22. Final Local Variable Initialization:

    • // LOCAL BLANK-*ALL:
    • Resets all local data areas to blanks again, likely to clear any residual data before the job ends or before invoking the AR300 procedure.

  23. Final Switch Setting:

    • // SWITCH 00000000:
    • Resets all job switches to 0, ensuring a clean state for the end of the job or for any subsequent processing.

External Programs Called

The OCL program explicitly calls or references the following external programs or procedures: 1. GSGENIEC: - Called via // CALL PGM(GSGENIEC). - Likely a utility program for environment setup or validation. 2. SCPROCP: - Invoked via // SCPROCP ,,,,,,,,?9?. - A system or custom procedure, possibly for job setup or data preparation. 3. GSY2K: - Invoked via // GSY2K. - A date-handling utility, likely for Y2K compliance or date conversions. 4. AR300P: - Loaded and executed via // LOAD AR300P and // RUN. - The main RPG program responsible for generating monthly statements. 5. AR300: - Invoked via // AR300 ,,,,,,,,?9?. - A procedure, possibly for post-processing or additional tasks related to AR300P.

Tables/Files Used

The OCL program references the following file: 1. ARCONT: - Declared via // FILE NAME-ARCONT,LABEL-?9?ARCONT,DISP-SHR. - Likely an accounts receivable control file containing data such as customer balances, transaction details, or statement information. - The ?9? substitution variable suggests the file resides in a library or location specified at runtime.

Additional Notes

  • Substitution Variable ?9?: This variable is used multiple times (SCPROCP, ARCONT, AR300). It likely represents a dynamic value, such as a library name, job parameter, or environment-specific setting, passed to the OCL at runtime.
  • Switches: The use of job switches (SWITCH 0XXXXXXX, IF SWITCH1-1) indicates conditional logic to control job flow, likely for error handling or branching based on the outcome of AR300P.
  • Environment: The OCL syntax and commands (e.g., LOAD, FILE, SWITCH) are specific to IBM midrange systems, suggesting this program runs on an AS/400 or IBM i system.
  • Limitations: Without the RPG source code for AR300P or documentation for GSGENIEC, SCPROCP, GSY2K, and AR300, the exact functionality of these components is inferred based on typical OCL and RPG patterns. Similarly, no explicit tables (e.g., database tables) are mentioned beyond the ARCONT file.

If you have additional context, such as the RPG source code for AR300P or details about the ?9? parameter, I can provide a more detailed analysis. Let me know if you need further clarification!