SAP Message 5P442 - Decision tree contains special characters, but is otherwise correct

Diagnosis
The decision tree of the feature contains special characters.
The corresponding feature table T549B does not contain a language key.
When a table without a language key is Unicode converted, specialcharacters require a lot of effort, as they must be assigned manually toa specific language (code page). Therefore, you should avoid usingspecial characters.

System Response
The system interprets all non-7Bit ASCII characters as specialcharacters.

Procedure
Check whether the special characters in the decision tree can perhaps bereplaced by 7Bit ASCII characters.