How To Fix 28034 - Boolean expression expected

SAP Error Message - Details

• Message type: E = Error

• Message class: 28 - Configuration

• Message number: 034

• Message text: Boolean expression expected

What causes this issue?

A boolean expression is an expression that is evaluated as true or
false.
The syntax check found an error. A boolean expression is expected at
the cursor.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check your entry and make the necessary correction. See also the other
possible causes of error (messages).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 28034 - Boolean expression expected ?

  The SAP error message "28034 Boolean expression expected" typically occurs in the context of ABAP programming when the system expects a Boolean expression (i.e., an expression that evaluates to true or false) but does not receive one. This can happen in various scenarios, such as in conditional statements, loops, or when using logical operators.
  Causes:
  
  Incorrect Syntax: The most common cause is a syntax error where the code does not properly form a Boolean expression. For example, using an assignment operator (=) instead of a comparison operator (==).
  Missing Conditions: If a conditional statement is incomplete or missing a necessary condition, the system may not be able to evaluate it as a Boolean expression.
  Data Type Issues: If the variables involved in the expression are not of a compatible type (e.g., trying to evaluate a string as a Boolean), this error can occur.
  Logical Errors: Using logical operators incorrectly or inappropriately can lead to this error.
  
  Solutions:
  
  
  Check Syntax: Review the code for any syntax errors. Ensure that all conditional statements are correctly formed and that you are using the correct operators.
  
  Example: Use IF condition1 AND condition2 instead of IF condition1 = condition2.
  
  
  
  Complete Conditions: Ensure that all conditional statements have complete and valid expressions. For example, make sure that you are not missing any parts of the condition.
  
  Example: Instead of IF (a > b), ensure that the condition is complete and valid.
  
  
  
  Data Type Validation: Verify that the variables used in the Boolean expression are of the correct data type. If necessary, convert data types to ensure compatibility.
  
  Example: Use CONCATENATE or CAST functions to ensure that the data types match.
  
  
  
  Logical Operators: Ensure that logical operators (AND, OR, NOT) are used correctly and that they are applied to valid Boolean expressions.
  
  Example: Ensure that you are not trying to combine non-Boolean expressions with logical operators.
  
  
  
  Debugging: Use debugging tools in the ABAP Workbench to step through the code and identify where the error occurs. This can help pinpoint the exact line or expression causing the issue.
  
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP ABAP documentation for more details on Boolean expressions and syntax rules.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other developers who may have encountered similar issues.
  Error Handling: Implement error handling in your code to gracefully manage unexpected conditions and provide meaningful error messages.
  
  By following these steps, you should be able to identify and resolve the "28034 Boolean expression expected" error in your SAP ABAP code.