How To Fix 28084 - Reserved name &1 invalid as key/variable name

28084 - Overview

• Message type: E = Error

• Message class: 28 - Configuration

• Message number: 084

• Message text: Reserved name &1 invalid as key/variable name

What causes this issue?

The syntax check found an error in a variable definition.

System Response

The cursor marks the place where the error occurs.

How to fix this error?

For example, in a constraint you have defined a name for an variable
linked to an object and/or a characteristic. This name is a reserved
name, for example:
DESK IS_A ... WHERE SIN = ..
Certain names are reserved - for example, SIN for the standard function
for sines.
Rename the variable. You could do this by putting a query in front of
the name, for example:
?DESK IS_A ... WHERE ?SIN = ..

Error message extract from SAP system. Copyright SAP SE.

28084 - Details

• The SAP error message "28084 Reserved name &1 invalid as key/variable name" typically occurs when you are trying to use a reserved keyword or name in a context where it is not allowed, such as in a key or variable name in a data dictionary object, program, or other SAP development objects.
  
  Cause:
  
  Reserved Keywords: The name you are trying to use (represented by &1 in the error message) is a reserved keyword in SAP. Reserved keywords are predefined by the SAP system and cannot be used as identifiers for variables, keys, or other objects.
  Naming Conventions: SAP has specific naming conventions and restrictions for various objects. If the name you are using does not comply with these conventions, it can trigger this error.
  
  
  Solution:
  
  Change the Name: The most straightforward solution is to change the name of the variable or key to something that is not a reserved keyword. You can refer to the