errorcii-d16b

CII-SR-01:CII namespace declaration required

Cross Industry Invoice must declare RSM namespace.

Fix this in your source system

MANUAL

CII documents must declare the RSM (ReusableAggregateBusinessInformationEntity) namespace. This is a fundamental XML structure requirement that must be configured in your invoicing software.

See the step-by-step instructions below to fix this error manually.

Why This Error Matters

CII requires UN/CEFACT namespaces.

How to Fix It

1

Add RSM namespace

urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100

2

Add RAM/UDT

Include component namespaces

Technical Details

XPath: /rsm:CrossIndustryInvoice/@xmlns:rsm

Common Causes

  • Missing rsm namespace
  • Wrong CII version

Frequently Asked Questions

Cross Industry Invoice must declare RSM namespace.
Add correct CII D16B namespace. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, CII-SR-01 is a critical error that will cause invoice rejection. It must be fixed before submission.

Related Errors

CII-SR-02

CII GuidelineSpecifiedDocumentContextParameter required

Last updated: 18 January 2026

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