How to Fix SyteLine EDI Transaction Rejections
When SyteLine rejects an inbound EDI transaction with 'EDI validation failed: mandatory segment missing' or an outbound EDI document fails with 'EDI mapping error: unable to resolve field [FieldName],' the entire supply chain communication is disrupted. EDI rejections in CloudSuite Industrial typically involve 850 (Purchase Orders), 856 (Advance Ship Notices), and 810 (Invoices), and require precise diagnosis of the failing segment, element, or mapping rule.
Diagnosing EDI Transaction Rejections
SyteLine EDI processing logs every inbound and outbound transaction in the EDI Transaction Log. The error messages are specific but dense: 'EDI validation failed: mandatory segment N1 missing in 850 document' means the trading partner's purchase order is missing the required name segment. 'EDI mapping error: unable to resolve field CustomerPO to SyteLine property' means the EDI-to-IDO mapping table has a gap for that specific field. Start diagnosis by pulling the raw EDI document from the EDI staging directory and comparing it against the trading partner's specification.
- Open the SyteLine EDI Transaction Log form and filter by status 'Rejected' to see all failed transactions with error codes and descriptions
- Retrieve the raw EDI flat file from the EDI staging directory (typically \\server\EDI\Inbound\Error\) and validate it using an EDI validator tool against the X12 standard
- Check the specific error: 'mandatory segment missing' means the trading partner omitted a required segment; 'invalid qualifier' means a code value is not in the SyteLine EDI code tables
- For mapping errors, review the EDI Mapping form in SyteLine to verify every required EDI element maps to a valid IDO property or SyteLine field
- Compare the trading partner's EDI specification version (e.g., X12 4010 vs 5010) against the SyteLine EDI configuration to detect version mismatches
Fixing Common EDI Rejection Scenarios
The most common EDI rejection fixes involve updating trading partner qualifiers, adding missing field mappings, and correcting data format mismatches. For inbound 850 rejections, the fix usually involves updating the customer's EDI setup in SyteLine to match their actual qualifier and ID values. For outbound 856 and 810 rejections, the fix typically involves correcting the SyteLine-to-EDI mapping to include all segments required by the trading partner.
- Update trading partner qualifiers: EDI Setup > Trading Partners > verify the Qualifier (e.g., 'ZZ' for mutually defined) and ID match the values in the received EDI envelope ISA segment
- Add missing EDI field mappings: EDI Setup > Document Mappings > add the missing element-to-property mapping for the specific document type and version
- Fix date format mismatches: ensure the EDI date format (CCYYMMDD vs YYMMDD) in the trading partner setup matches the format in the actual EDI documents received
- For 856 ASN rejections, verify that the shipment, order, and item hierarchical levels (HL segments) are structured correctly in the outbound mapping configuration
- Reprocess rejected transactions: update the transaction status to 'Pending' in the EDI Transaction Log and trigger the EDI processing job to retry
EDI Reliability Best Practices
Reliable EDI processing requires automated validation of every inbound document before it reaches SyteLine's business logic, proactive monitoring of EDI transaction success rates, and a standard onboarding process for new trading partners that validates connectivity and document compliance before going live.
- Implement pre-processing EDI validation that checks all inbound documents against the expected specification before passing them to SyteLine for processing
- Set up automated alerts when the EDI rejection rate exceeds 5% for any trading partner, triggering a review of recent specification changes or data quality issues
- Create a trading partner onboarding checklist that includes test document exchange, mapping validation, and acknowledgment (997) verification before production cutover
- Maintain a trading partner specification library documenting each partner's EDI version, required segments, custom qualifiers, and contact information for EDI support
Netray AI agents validate EDI transactions in real time, auto-correct common mapping errors, and alert your team to trading partner specification changes before rejections occur. Contact us.
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