No ISO code can be determined for country key &

What causes this issue?

No IDoc can be generated because no ISO code has been maintained for
country key &V1&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

INCLUDE NA_SYSADMIN1 LANGUAGE EN

Procedure for System Administrators

Check the ISO code of the currency in Customizing (general settings)
and maintain if necessary.

Error message extract from SAP system. Copyright SAP SE.