I tried changing the mask values, but it still fails, as I expected. The mask values relate to Windows accessing shares on the QNX system. The problem I am having is with the QNX system mounting shares on the Windows 7 system.I type the following on the QNX system, to troubleshoot QNX failing to mount the Windows shares: smbclient -L WindowsXP This works fine to a Windows XP system and shows the list of shares. smbclient -L Windows7 This fails to the Windows 7 Home Premium system. ERRDOS - ERRunsup (The operation is unsupported).