How To Fix BSP_WD020 - Expression '&1' with wildcard '*' is invalid here: Check search criterion

SAP Error Message - Details

• Message type: E = Error

• Message class: BSP_WD -

• Message number: 020

• Message text: Expression '&1' with wildcard '*' is invalid here: Check search criterion

What causes this issue?

You have entered a search expression containing the wildcard character
'*'. This, however, is not supported for search operators other than
<LS>is</> or <LS>equals</>.

System Response

Your search has not been executed or saved.

How to fix this error?

Correct your input to proceed.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BSP_WD020 - Expression '&1' with wildcard '*' is invalid here: Check search criterion ?

  The SAP error message BSP_WD020 typically occurs in the context of Web Dynpro applications when there is an issue with the expression used in a search criterion, particularly when using wildcards. The error indicates that the expression you are trying to use is not valid in the current context.
  Cause:
  
  Invalid Wildcard Usage: The error often arises when a wildcard (*) is used incorrectly in an expression. For example, if you are trying to filter or search for values in a table or a list and the syntax does not conform to the expected format.
  Contextual Restrictions: Certain fields or contexts may not support wildcard searches. For instance, if the field is not defined to accept wildcards or if the search criteria are too broad or improperly formatted.
  Data Type Mismatch: The expression may be trying to compare incompatible data types, which can lead to this error.
  
  Solution:
  
  Check Expression Syntax: Review the expression you are using. Ensure that it follows the correct syntax for the context in which it is being used. If you are using wildcards, make sure they are placed correctly.
  Use Valid Search Criteria: Instead of using wildcards, try to use specific values or patterns that are valid for the field you are querying. If you need to search for a range of values, consider using other operators or methods that are supported.
  Review Field Properties: Check the properties of the field you are trying to filter. Ensure that it is configured to accept wildcard searches if that is your intention.
  Debugging: If you have access to the development environment, use debugging tools to trace the execution and see where the expression is being evaluated. This can provide insights into why the expression is considered invalid.
  Consult Documentation: Refer to the SAP documentation for Web Dynpro and the specific component you are working with. There may be guidelines or examples that clarify the correct usage of expressions and wildcards.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context on how to handle wildcard expressions in Web Dynpro.
  Community Forums: SAP Community and other forums can be valuable resources for finding similar issues faced by other users and the solutions they found effective.
  Web Dynpro Documentation: Familiarize yourself with the Web Dynpro programming model, especially regarding expressions, binding, and search criteria.
  
  By following these steps, you should be able to identify the cause of the BSP_WD020 error and implement a solution to resolve it.