Russ,
Thanks for your reply. I had read TN 31191 before putting the post up and checked the server name in System Information and in the 'Servers in Farm' section of the Sharepoint farms central admin application. In both cases the server name appeared as AP-2. The system and application logs on both the Sharepoint server and backup server are clear of any messages related to Sharepoint or Backup Exec and there are no errors or warnings that match up with the times at which I was attempting to connect.. I'm wondering whether the 'SPSWrapper debug log' mentioned in TN 31191 would shed any more light on the mystery, but I am unsure where to find it. I would imagine that this log would contain some clues as to the actual values being passed in the queires.
I have checked the most recent 'beremote' log on the BEWS server and found a few lines that appear to relate to the problem:
[5196] 05/22/09 08:31:53 Attach to ADCFS::\\domain.local
[3468] 05/22/09 08:31:56 FS_ResolveDevName: [\\ap-2.domain.local]
[3468] 05/22/09 08:31:56 MB2-Resolve returned 1
[3468] 05/22/09 08:31:56 Notes Agent:CLNFileSystem::ResolveDeviceName
[3468] 05/22/09 08:31:56 ENTER DPM::ResolveDeviceName
[3468] 05/22/09 08:31:56 deviceName: [\\ap-2.domain.local]
[3468] 05/22/09 08:31:56 DPM: Device NOT claimed
[3468] 05/22/09 08:31:56 EXIT DPM::ResolveDeviceName return=[0x1 S_FALSE]
[3468] 05/22/09 08:31:56 ADC_ResolveDeviceName: pid = 1036, checking \\ap-2.domain.local
[3468] 05/22/09 08:31:56 Could not resolve the 'ndmp' service, error: 10109, using port 10000
[3468] 05/22/09 08:31:56 ndmpConnectEx: Querying the neighbour advertisement cache to discover information on 'ap-2.domain.local' ...
[3468] 05/22/09 08:31:56 ndmpConnectEx : Control Connection information: A connection was established between end-points *bews_ipaddress*:3869 and *sps_ipaddress*:10000.
[3468] 05/22/09 08:31:57 NDMP version 3 connection CONNECTED
[3468] 05/22/09 08:31:57 ERROR: 1 Error: Call is not supported
[3468] 05/22/09 08:32:27 DS_CloseSelectionService
[3468] 05/22/09 08:32:27 @@@@@@@MyCloseSocket called with sockfd = 972(0x3cc) retval = 0
[3468] 05/22/09 08:32:27 @@@@@@@MyCloseSocket called with sockfd = -1(0xffffffff) retval = -1
[5196] 05/22/09 08:32:27 Detach from ADCFS::\\domain.local
[5196] 05/22/09 08:32:27 DsWorkerThread terminating with exit code 0
It appears that there is a problem with NDMP but, as I am unsure as to what NDMP does, I am not sure whether it is related to my problem.