1208524 - Error: 'The function cannot be used because it must be evaluated later', display in Crystal Reports

• Error when saving a formula.
• When checking a formula, Crystal Reports returns the error:
  
  "The function cannot be used because it must be evaluated later"
    
   
    
  
  What causes this error, and what does it mean?

• SAP Crystal Reports 2011
• SAP Crystal Reports 2013
• SAP Crystal Reports 2016 

CR , KBA , BI-RA-CR , Crystal Reports designer or Business View Manager , Problem