INFO: RPC CALLBACK Attribute and Unsupported Protocol Sequences

ID: Q131495

The information in this article applies to:

Microsoft Win32 Software Development Kit (SDK) version 3.5

SUMMARY

The CALLBACK attribute of RPC does not support connection-less protocol sequences.

MORE INFORMATION

If an RPC interface has a procedure with the CALLBACK attribute, it can only make use of connection-oriented protocol sequences. The following protocol sequences are not supported:

ncadg_ip_udp
ncadg_ipx

If an RPC client tries to call a remote procedure that in turn calls a procedure back on client, the client will be able to make the initial call, but when the server tries to call the procedure on client, the RPC run time generates exception 1726: The remote procedure call failed.

Additional query words:

Keywords          : kbnetwork kbAPI kbNTOS350 kbRPC kbSDKPlatform kbGrpNet 
Issue type        : kbinfo

Last Reviewed: December 19, 1998