INFO: RPC CALLBACK Attribute and Unsupported Protocol Sequences (131495)


The information in this article applies to:

  • Microsoft Win32 Software Development Kit (SDK) 3.5
This article was previously published under Q131495

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.
Modification Type:MajorLast Reviewed:1/8/2000
Keywords:kbAPI kbinfo kbnetwork kbRPC KB131495
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