>I'v setup a COM server on a WinNT server. Connections are via dial-up from Win 95/98 notebooks. All notebooks connect to and manipulate the VFP data on the server fine, except one. It will be working OK then I will get the error: RPC Server is unavailable. Sometimes hitting Retry will work and sometimes not.
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>Any ideas?

I would be most suspect of the dial-up connection. Does the machine also drop the dial up connection?