SAP Message 28064 - Class (&)& not valid

Diagnosis
The syntax check found an error in an entry for a class. Thecombination of class type and class number is incorrect.

System Response
The cursor shows where the error occurs in your entry.

Procedure
A class is accessed via the class type and language-independent classnumber, for example:
(300)TV_SET
Check whether the class type at the cursor, &V1&, exists, and whetherthe class you entered, &V2&, exists for this class type and is valid.Check also other possible causes of error (messages).