How To Fix WD500 - Parameter & is a constant

SAP Error Message - Details

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 500

• Message text: Parameter & is a constant

What causes this issue?

You have entered a constant as a parameter for the user decision.

System Response

At runtime, the parameter is replaced by the constant you have entered.
It is therefore unnecessaty to use the variable. You can write the text
directly in the title of the user decision.

How to fix this error?

However, if you wish to display the CONTENTS of a container element or
an object variable at runtime, you must enter a valid expression for a
variable or a system field using F4 possible entries help.

Error message extract from SAP system. Copyright SAP SE.