Solution : https://service.sap.com/sap/support/notes/432362 (SAP Service marketplace login required)
Key words : 
additional key words bex map, symptom map legend, bw frontend 20b/21, printed incompletely, screen display, print preview, prerequisites
Related Notes : 
       
| 367280 | BW 2.0B/2.1C Frontend patch 12 |