How to Copy Production Client IDocs to a Test System for Error Analysis and Debugging

Overview

When an IDoc processing error occurs during SAP system operations, debugging directly in the production client can pose risks to system stability and data integrity. Therefore, to accurately analyze and resolve the root cause of an error IDoc, it is common practice to copy the relevant IDoc information to a test or development client. This allows for processing tests and debugging under identical conditions. This document provides a step-by-step guide for extracting and processing IDoc files in such scenarios. This method is particularly useful when IDoc data needs to be manually transferred between systems with limited network connectivity.

Prerequisites

To perform this procedure, the following are required:

* Authorizations: You need authorization to use transactions WE19, CG3Y, CG3Z, WE16, WE02, SE37, and BD87, as well as read/write access to application server file paths (AL11). Specifically, AL11 directory access permissions are related to authorization objects such as S_PATH and S_DATASET.

* AL11 Path Knowledge: You must know a valid directory path on the application server (a path registered in AL11) where files can be stored and read.

* IDoc Number: The number of the target IDoc to be analyzed in the production client must be identified in advance (e.g., using transaction WE02).

Extracting and Downloading IDoc Files from the Production Client

1. Generating the IDoc File using WE19

Transaction WE19 is a useful tool for copying existing IDocs or creating new ones for testing purposes. Here, we will extract an existing error IDoc into a flat file format.

1. Execute transaction WE19.
2. On the initial screen, select the "Existing IDoc" radio button and enter the target IDoc number in the "IDoc number" field.
3. Press Enter to display the IDoc test tool screen. Here, click the "Inbound File" button. This function saves the content of the IDoc as a flat file on the application server's file system.
4. In the pop-up screen, specify a temporary AL11 path and file name for saving the IDoc file in the "File name" field (e.g., /tmp/POIDOC_test).

* Important: The "Start inbound IDoc processing of file now" checkbox must be unchecked. Selecting this checkbox could lead to immediate reprocessing of the IDoc in the production client; therefore, it should be unchecked for file extraction purposes.

1. Click the "Execute" button to save the IDoc data to the specified path as a file.

2. Downloading the File using CG3Y

Now, download the IDoc flat file stored on the application server to your local PC (frontend).

1. Execute transaction CG3Y.
2. In the "Source file on application server" field, enter the full path and name of the file saved with WE19 in the previous step (e.g., /tmp/POIDOC_test).
3. In the "Target file on front end" field, specify the path and file name on your local PC where you want to save the file (e.g., C:\Users\[Your_User_Name]\Desktop\substanc.dat). It is common to use the .dat extension for IDoc flat files.
4. Click the "Download" button to download the file to your local PC.

Uploading and Processing the IDoc File in the Test Client

1. Uploading the File using CG3Z

Now, upload the downloaded IDoc file to the application server of the test client.

1. Log in to the test or development client and execute transaction CG3Z.
2. In the "Source file on front end" field, enter the full path and name of the file saved on your local PC (e.g., C:\Users\[Your_User_Name]\Desktop\substanc.dat).
3. In the "Target file on application server" field, specify the AL11 path and file name where the file will be saved on the test client's application server (e.g., /usr/sap/trans/substanc.dat). Write authorization for the target path is required.
4. Click the "Upload" button to upload the file to the test client's application server.

2. Processing the IDoc File using WE16

Perform inbound IDoc processing in the test client based on the uploaded IDoc flat file.

1. Execute transaction WE16.
2. In the "File name" field, enter the full path and name of the file uploaded with CG3Z in the previous step (e.g., /usr/sap/trans/substanc.dat).
3. In the "Port" field, enter EDIUS4019. This is an example; in a real project, you should use a valid file port defined in transaction WE21. A file port defines the communication channel for exchanging IDoc data in file format.
4. Click the "Execute" button to process the IDoc file.

3. Verifying IDoc Processing Results in WE02

Verify that the IDoc has been successfully created and processed.

1. Execute transaction WE02.
2. Check the IDoc number generated after WE16 processing, or search for newly created IDocs by entering search criteria such as date and time.
3. Confirm that the IDoc's status code indicates successful processing (e.g., Status 53). If an error occurred, you can identify the cause through the status message.

Additional Steps for Debugging

If an error occurs during IDoc processing or if specific logic needs to be debugged, consider the following additional steps:

1. Identify the error IDoc in WE02 or WE05, and check the control record and data segments to gather relevant information.
2. Verify the process code defined in the inbound parameters of the relevant partner profile in transaction WE20.
3. In transaction SE37, find the function module linked to the process code (e.g., IDOC_INPUT_*) and set a session breakpoint at the desired location for debugging.
4. Reprocess the IDoc via transaction BD87 to enter debugging mode. Alternatively, in WE19, select the IDoc, then choose the "Inbound Function Module" option along with "Call in debugging mode" to start debugging.

Important Notes and Additional Tips

* Authorization Management: Access and write permissions for application server file paths (AL11) should be appropriately managed in consultation with the SAP Basis team.

* Data Security: When transferring sensitive data from the production client to a test system, data security and privacy policies must be strictly adhered to.

* Port Settings: The port used in WE16 must be a file port predefined in WE21. EDIUS4019 is an example; use the appropriate port name for your actual environment. If a port does not exist, you must create one or utilize an existing valid file port.

* File Encoding: Be careful to avoid encoding issues during file transfer. Generally, transferring in text mode (ASCII) is safer.

* WE16 is for Testing: Transaction WE16 is primarily used for testing purposes. For processing large volumes of inbound IDoc files in a real operational environment, other standard methods (e.g., automatic inbound processing configuration) should be considered.

Conclusion

The procedure described in this document provides an effective way to safely transfer IDoc errors from a production environment to a non-production environment for in-depth analysis and debugging. This helps reduce problem resolution time and contributes to system stability. It is crucial to adhere to the important notes for each step and ensure that the necessary authorizations are in place for accurate execution.