IDoc Debugging and Production Support

Explanation

IDoc production support requires a structured approach. First identify direction, message type, partner, status and error message. Then inspect segment data and configuration. For inbound failures, identify process code and function module, then debug reprocessing if needed. For outbound failures, identify trigger method, partner profile, port and tRFC status. Use BD87 to reprocess after root cause correction. Use SM58 for tRFC errors, SM13 for update failures, ST22 for dumps and SLG1 if application logs are used.

Code example

* IDoc support checklist:* 1. WE02/WE05: Check IDoc status, message type and partner.* 2. Read status message details and long text.* 3. Check segment data for wrong or missing business values.* 4. For inbound: identify process code and processing FM.* 5. For outbound: check output/change pointer/trigger logic.* 6. Check WE20 partner profile and WE21 port.* 7. Check SM58 for tRFC failure.* 8. Use BD87 only after root cause is fixed. * Debugging tip:* For inbound IDoc, reprocess through BD87 with breakpoint in process FM.

Real project scenario

An inbound INVOIC IDoc failed with status 51. Status message showed invalid tax code. Segment data confirmed wrong tax code from middleware. The issue was corrected at source and IDoc was reprocessed successfully.

Common mistakes

- Reprocessing repeatedly without analysis. - Not checking segment data. - Debugging wrong direction. - Ignoring tRFC, update or dump logs.

Best practices

- Follow structured support checklist. - Fix root cause before reprocessing. - Use correct tools for direction and error type. - Capture evidence before changing configuration.

Interview angle

For 8–12 years, answer should include WE02, WE20, process code, BD87, SM58, segment data and debugging strategy.