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Message type: E = Error
Message class: WD - Workflow definition
Message number: 500
Message text: Parameter & is a constant
You have entered a constant as a parameter for the user decision.
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.
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.
WD500
- Parameter & is a constant ?SAP Error Message:
WD500 Parameter & is a constant
Cause:
This error typically occurs in the context of Web Dynpro ABAP programming. The message indicates that a parameter, which is expected to be a variable or a reference, is instead a constant value. In other words, the code or configuration is trying to pass a constant (literal value) where a parameter (variable or reference) is required.
For example, this can happen if you try to pass a literal string or number directly to a method or function that expects a parameter to be a variable or a reference, or if you try to assign a constant to a parameter that is defined as a changing or exporting parameter.
Common Scenarios:
'X'
, 1
, 'constant'
) to a method parameter that expects a variable or reference.Check the method or function interface: Verify the parameter definitions. If the parameter is defined as CHANGING
or EXPORTING
by reference, you cannot pass a constant or literal value.
Pass a variable instead of a constant: Declare a variable in your code, assign the constant value to it, and then pass the variable to the method.
DATA lv_value TYPE string.
lv_value = 'X'.
CALL METHOD some_method
EXPORTING
param = lv_value.
Review the Web Dynpro context and method calls: Ensure that the parameters passed in the context mapping or method calls are variables or references, not constants.
Check the event handler implementations: Sometimes, event handlers expect parameters to be variables; passing constants directly can cause this error.
WD500
is a Web Dynpro message class.Aspect | Details |
---|---|
Error | WD500 Parameter & is a constant |
Cause | Passing a constant (literal) where a variable/reference parameter is expected |
Solution | Pass a variable instead of a constant; check method parameter definitions and usage |
Context | Web Dynpro ABAP method calls, event handlers, context mapping |
If you provide the specific code snippet or scenario where this error occurs, I can help you with a more precise fix.
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