SAP Message 5P440 - Do not include special characters

Diagnosis
Do not enter a special character in this field.
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 you can make an entry without special characters.