DOCUMENT:Q171667 09-AUG-2001 [winnt] TITLE :Err Msg: Cannot Determine the Device from the Given File Name PRODUCT :Microsoft Windows NT PROD/VER:WINDOWS:4.0 OPER/SYS: KEYWORDS:kbenv kberrmsg ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation version 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== When you attempt to open a file with a .wav or .avi extension, you may receive the following error message: Cannot determine the device from the given file name extension CAUSE ===== This error message can occur if a registry value under one of the following registry keys is missing: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\MCI HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion \MCI Extensions NOTE: The above registry key is one path; it has been wrapped for readability. RESOLUTION ========== WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk. Use Registry Editor (Regedt32.exe) to view the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ MCI Extensions Verify that the following values exist under the following key(s): Value name: avi Value type: REG_SZ Value data: AVIVideo Value name: Mid Value type: REG_SZ Value data: Sequencer Value name: rmi Value type: REG_SZ Value data: Sequencer Value name: Wav Value type: REG_SZ Value data: WaveAudio If any of these values are missing, click Add Value on the Edit menu to add them. Additional query words: filename ====================================================================== Keywords : kbenv kberrmsg Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search Version : WINDOWS:4.0 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.