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

BSP_WD020 - Overview

• 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.

BSP_WD020 - Details

• 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