SAP Message 28068 - Object name expected in parantheses

Diagnosis
The syntax check found an error in an entry for an object. Parenthesesare missing from around the key.

System Response
The cursor shows where the error occurs.

Procedure
To refer to an object, you enter the object type, class type, andobject key:
(Material)(300)(NR='M4711')
The object identifier and object key are defined in the IMG forClassification. In the Define object types step, you cansee the object key for each object type. The fields of the object keyare referred to via a special field ID. The object key for materials isthe material number. The material number is accessed by the field ID'NR'.
The object key can also consist of several parts, as it does fordocuments, for example:
(Document)(017)(TYPE=DRW, VERSION=00, PART=000, NR='bmw-ca31')
The key expressions entered must be in parentheses: (NR='M4711') or(TYPE=DRW, VERSION=00, PART=000, NR='bmw-ca31'). Check the parenthesesand correct them according to the pattern shown if required.