3653618 - Error "ISO code XX is not assigned to a country key" during mass maintenance in business partner

• Error message: "ISO code XX is not assigned to a country key (Message no. B1880)" appears while executing the Mass Maintenance - Business Partner app.
• The error can also be reproduced in the "Manage Business Partner Master Data" app by searching for a specific business partner, switching to edit mode, and clicking the check button.

SAP S/4HANA Public Cloud Edition

1. Open the Mass Maintenance - Business Partner app.
2. Attempt to execute the mass maintenance process.
3. Observe the error message: "ISO code 91 is not assigned to a country key (Message no. B1880)".

• The error occurs due to incorrect naming conventions used for maintaining the tax category of business partners.
• A validation check in the Mass Maintenance - Business Partner app triggers this error when changes are implemented.

You can create custom tax number categories with a prefix 9, in SSCUI Define Tax Number Categories (ID: 104758) as shown in the below format:

9<Country/Region ISO Code><Tax number>

For example, the categories in India:

Naming Conventions

• The standard settings follow a naming convention of a prefix number 9, two letters, and a number.
• The custom tax number category should start with the number 9.
• The next two letters are the ISO code of the country/region that the tax number is used in.
• The last number is a sequential tax number, which is in the range 1–6.

This custom tax number category is required to be maintain by adding in the SSCUI 102415 - Maintain Tax Number Categories.

Refer to: Define Tax Number Categories | SAP Help Portal 

ISO code error, ISO code 91, country key not assigned, mass maintenance, business partner, error B1880, tax category naming convention, SSCUI Define Tax Number Categories, SAP S/4HANA Cloud Public Edition, manage business partner master data, naming convention error, custom tax category. , KBA , LO-MD-BP-2CL , Business Partners for Public Cloud , Problem