errorcii-d16b

CII-SR-001:Invalid CII namespace

CII (Cross Industry Invoice) documents must use the correct namespace declaration.

Fix this in your source system

MANUAL

CII (Cross Industry Invoice) documents require correct XML namespace declarations. This is a fundamental format issue that must be fixed in your invoicing software or XML generation tool. The namespace must be urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100.

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

Why This Error Matters

Incorrect namespaces prevent CII validation and processing.

How to Fix It

1

Check root element

Must be rsm:CrossIndustryInvoice

2

Verify namespace

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

3

Add component namespaces

Include ram, udt, qdt namespaces

Code Example

<rsm:CrossIndustryInvoice
  xmlns:rsm="urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100"
  xmlns:ram="urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100"
  xmlns:udt="urn:un:unece:uncefact:data:standard:UnqualifiedDataType:100">

Technical Details

XPath: /rsm:CrossIndustryInvoice namespace

Common Causes

  • Wrong namespace version
  • Missing component namespaces
  • Typos in namespace URIs

Commonly Seen In

ZUGFeRD generatorsCII exporters

Frequently Asked Questions

CII (Cross Industry Invoice) documents must use the correct namespace declaration.
Use the correct CII D16B namespace. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, CII-SR-001 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.
Many instances of CII-SR-001 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues, including invalid cii namespace.
CII-SR-001 is commonly seen in exports from ZUGFeRD generators, CII exporters. These software packages sometimes generate invoices that need adjustment to meet full compliance standards.

Related Errors

UBL-CR-002

Invalid or Missing Namespace

Last updated: 18 January 2026

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