2257886 - ITS Up/Down: Error message during download via WEBGUI

During download a file via SAP GUI for HTML the following error message appears:

1. The page at <host>:<port> says: Error: NOT_FOUND_ERR
    
   
   
2. Error: Frontend Service Method: Query file or directory "C:\<file name>".
   The path "C:\<file name>" contains forbidden characters or has an invalid format.
   (Absolute paths must start with Z: or z: for Windows, and with /Z for other systems.)
   

After clicking on the OK button, the Error writing file message appears. Double-clicking on the error text, the error message number FES016 can be seen as well:

• SAP NetWeaver
• SAP GUI for HTML (webgui service)
• Internet Transaction Server (ITS)
• In case of below kernel versions, if the applet-free frontend service implementation has been activated:
• SAP Kernel Release 722 from patch 19 up to 129
• SAP Kernel Release 742 from patch 311 and higher
• SAP Kernel Release 745 from patch 25 up to 117
• SAP Kernel Release 746 from patch 12 and higher
• In case of below kernel version by default:
• SAP Kernel Release 722 patch 130 and higher
• SAP Kernel Release 745 patch 118 and higher
• SAP Kernel Release 749 and higher

FES 016 , NWBC , NetWeaver Business Client , Enterprise Portal, Fehler beim Schreiben der Datei, Fehler: Frontend-Service-Methode: Datei oder Verzeichnis "C:\test.txt" abrufen. Der Pfad "C:\test.txt" enthält unzulässige Zeichen oder hat ein ungültiges Format. (Absolute Pfade müssen mit Z: oder z: (Windows) und mit /Z (andere Systeme) beginnen.), Internet Explorer, IE, Mozilla Firefox, FF, Apple Safari, Google Chrome , KBA , is too long, , ~webgui_updown_noapplet_mode , BC-FES-ITS , SAP Internet Transaction Server , BC-FES-WGU , SAP GUI for HTML , Problem