Identifying customer exits in SAP is a crucial step when you want to extend or enhance standard functionality without modifying the core system. SAP provides various tools and methods to find the appropriate customer exits for a given transaction or program. Here’s how you can identify them:

1. Using Transaction SMOD (SAP Enhancements)

SMOD is the primary transaction for working with customer exits. Here’s how to use it:

• Step 1: Go to transaction SMOD.
• Step 2: Click on “F4” in the Enhancement field to display a list of all available enhancements (user exits and customer exits).
• Step 3: You can search for the required exits using various criteria, such as enhancement name or description. For example, you can search for enhancements related to specific transactions like VA01 (Create Sales Order).

2. Using Transaction CMOD (Project Management for Enhancements)

After identifying the exit via SMOD, you can use CMOD to manage and implement them.

• Step 1: Go to transaction CMOD.
• Step 2: Create a new project by giving it a name and description.
• Step 3: Assign the desired enhancement (from SMOD) to this project.
• Step 4: Implement the necessary ABAP code for the specific function module, screen, or field exits.

3. Finding Customer Exits via Transaction SE93

To identify customer exits for a specific transaction code, you can use transaction SE93 to determine the program behind the transaction. Here’s how:

• Step 1: Go to transaction SE93.
• Step 2: Enter the transaction code (e.g., VA01) and click on Display.
• Step 3: Identify the program associated with the transaction.
• Step 4: Once you know the program name, use SE38 or SE80 to search for keywords like “CALL CUSTOMER-FUNCTION” within the program’s code to locate the exits.

4. Using Program Code Search

You can also directly search for customer exits by scanning the program code for exit calls. SAP programs often use the syntax CALL CUSTOMER-FUNCTION to indicate a customer exit.

• Step 1: Use transaction SE80 (Object Navigator) or SE38 (Program Editor) to open the program.
• Step 2: Search for the string CALL CUSTOMER-FUNCTION or USEREXIT_ in the code using the search functionality (Ctrl + F).
• Step 3: Review the code to identify the exits and their purpose.

5. Using SAP Enhancement Repository (SE84)

SE84 is the SAP Repository Information System, and it can help you search for various enhancement types, including customer exits:

• Step 1: Go to transaction SE84.
• Step 2: In the navigation tree, go to Enhancements → Customer Exits.
• Step 3: Enter the relevant criteria (like the program or package name) to search for available customer exits.

6. Checking Documentation

Sometimes the documentation of a specific transaction or program provides details on available customer exits. To check this:

• Step 1: Go to the transaction where you want to find the exit.
• Step 2: Press F1 on a field or process you want to enhance, and in the help documentation, click on the Technical Information button.
• Step 3: This can often give clues about the programs or screens where the exits might be implemented.

7. Using Debugging

If you are unable to find a customer exit using the above methods, debugging can help:

• Step 1: Set a breakpoint in the standard program.
• Step 2: Look for CALL CUSTOMER-FUNCTION or similar customer exit-related function modules during debugging.
• Step 3: Note down the name of the exit, and implement it using the CMOD transaction.

Common Exit Search Tips:

• Exit Naming: Customer exits often follow a naming convention, starting with EXIT_ for function module exits or USEREXIT_ for code enhancements.
• Use Wildcards: When searching in SMOD or SE84, you can use wildcards (e.g., *VA01*) to find enhancements related to a specific transaction.

By following these steps, you can efficiently identify and implement customer exits to extend the standard SAP functionality according to your specific business requirements.