Rick,
What do you mean by "explicit reference to the client"?
>Catastrophic Failure usually means the server proxy has disconnected or otherwise lost in some way. It's essentially the generic remote error that COM uses.
>
>Callbacks may not work the same way as on a local machine - you need to make sure the server has an explicit reference to the client. Two way communication over DCOM is very tricky to get right.
>
>+++ Rick ---
>
>>I am getting the following:
>>OLE error code 0x8000ffff: Catastrophic failure.
>>when a remote server does callback to the client.
>>Here is the callback method:
>>
>>

>>LPARAMETERS toMachine
>>LOCAL lcSql
>>
>>TEXT TO lcSql TEXTMERGE NOSHOW
>>	usp_UpdateReadings '<<toMachine.ReadFromScanner.pcLastReading>>',
>>	<<toMachine.pnMachineRegistrationId>>, <<toMachine.pnUserId>>
>>ENDTEXT	
>>IF This.mExecuteSqlCommand(lcSql, '', '') >= 1
>>	*!* Update client monitors with new read
>>	This.poCallingObj.mExecuteCommand(toMachine)
>>ELSE
>>	*!* If SQL has returned an error, dont call Client
>>ENDIF	
>>

>>Where This.poCallingObj has a referance to the client.
>>Any idea, please?
>>
>>Thanks