Does the client use the same SMB dialect as the server?

Some older client software does not use the extended SMB protocol in the same way as the server. Follow these links:

• LM-NT-OS/2 Realm->Manage File Services->[select the service]->Administer->Configuration

For SMB dialect, select core.

To force the client to revert to the core protocol from the UNIX command line, use this command:

tnservice -M -r NB -s servicename -a smb-protocol-level=on