SAP Message 28106 - Value &1 has subordinate values

Diagnosis
Value &V1& is defined as a hierarchy node with subordinate values in avalue hierarchy. You cannot use this value as a single value. You canonly use this value to denote a value set.

Procedure
Check whether you entered the characteristic value correctly. If youstill want to enter a hierarchy node, please note that you must use thekeyword 'IN'. For example:
COUNTRY IN 'Europe'
NOT
COUNTRY = 'Europe'