How To Fix WER195 - At least one expression must be declared

SAP Error Message - Details

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 195

• Message text: At least one expression must be declared

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message WER195 - At least one expression must be declared ?

  SAP Error Message:
  
  WER195 - At least one expression must be declared
  
  Cause:
  This error occurs in SAP when you are working with SAP Workflow or Business Rule Framework plus (BRFplus) and you try to activate or execute a rule, decision table, or expression without defining any expressions. Essentially, the system expects at least one expression to be declared in the rule or decision table, but none has been provided.
  In other words, the error means that the workflow or rule object is incomplete because it lacks the necessary logical expressions or conditions that define its behavior.
  
  When does it occur?
  
  When creating or activating a BRFplus rule or decision table without any expressions.
  When defining a workflow rule or condition that requires at least one expression but none is provided.
  When using the Rule Editor or Expression Editor and saving or activating without any expressions.
  
  
  Solution:
  
  
  Define at least one expression:
  
  Open the rule, decision table, or workflow condition where the error occurs.
  Add at least one valid expression or condition that the system can evaluate.
  For example, in BRFplus, add a formula, decision table, or expression that returns a value or boolean result.
  
  
  
  Check the rule or workflow logic:
  
  Ensure that the rule or workflow step is logically complete.
  If the rule is supposed to be empty (rare case), reconsider the design because the system requires at least one expression.
  
  
  
  Activate the rule or workflow after adding expressions:
  
  After adding the necessary expressions, activate the object again.
  The error should no longer appear.
  
  
  
  
  Additional Information:
  
  BRFplus (Business Rule Framework plus): This framework requires rules to have expressions that define the logic. An expression can be a formula, decision table, or other rule types.
  Workflow Conditions: In SAP Workflow, conditions must have expressions to evaluate whether a step should be executed.
  Error Message Text:
  
  "At least one expression must be declared" indicates a missing logical component in the rule or workflow.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WER195 - At least one expression must be declared
  
  
  Cause
  No expressions defined in a rule, decision table, or workflow condition
  
  
  Solution
  Add at least one valid expression or condition and activate the object
  
  
  Context
  SAP Workflow, BRFplus, Rule Editor
  
  
  
  
  If you provide more context (e.g., transaction code, object type), I can give more specific guidance.