diff --git a/src/cas/generic/casAsyncAtIOI.cc b/src/cas/generic/casAsyncAtIOI.cc
deleted file mode 100644
index b4898b488..000000000
--- a/src/cas/generic/casAsyncAtIOI.cc
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- *      $Id$
- *
- *      Author  Jeffrey O. Hill
- *              johill@lanl.gov
- *              505 665 1831
- *
- *      Experimental Physics and Industrial Control System (EPICS)
- *
- *      Copyright 1991, the Regents of the University of California,
- *      and the University of Chicago Board of Governors.
- *
- *      This software was produced under  U.S. Government contracts:
- *      (W-7405-ENG-36) at the Los Alamos National Laboratory,
- *      and (W-31-109-ENG-38) at Argonne National Laboratory.
- *
- *      Initial development by:
- *              The Controls and Automation Group (AT-8)
- *              Ground Test Accelerator
- *              Accelerator Technology Division
- *              Los Alamos National Laboratory
- *
- *      Co-developed with
- *              The Controls and Computing Group
- *              Accelerator Systems Division
- *              Advanced Photon Source
- *              Argonne National Laboratory
- *
- *
- * History
- * $Log$
- *
- */
-
-#include "server.h"
-#include "casAsyncIOIIL.h" 	// casAsyncIOI in line func
-#include "casChannelIIL.h"	// casChannelI in line func
-#include "casCtxIL.h"		// casCtx in line func
-#include "casCoreClientIL.h"	// casCoreClient in line func
-
-//
-// casAsyncAtIOI::casAsyncAtIOI()
-//
-epicsShareFunc casAsyncAtIOI::casAsyncAtIOI (const casCtx &ctx, 
-			casAsyncPVAttachIO &ioIn) :
-	casAsyncIOI (*ctx.getClient(), ioIn),
-	msg (*ctx.getMsg()),
-	retVal (S_cas_badParameter)
-{
-	assert (&this->msg);
-	this->client.installAsyncIO (*this);
-}
-
-//
-// casAsyncAtIOI::~casAsyncAtIOI()
-//
-casAsyncAtIOI::~casAsyncAtIOI()
-{
-	this->client.removeAsyncIO (*this);
-}
-
-//
-// casAsyncAtIOI::postIOCompletion()
-//
-epicsShareFunc caStatus casAsyncAtIOI::postIOCompletion(const pvAttachReturn &retValIn)
-{
-	this->retVal = retValIn; 
-	return this->postIOCompletionI ();
-}
-
-
-//
-// casAsyncAtIOI::cbFuncAsyncIO()
-// (called when IO completion event reaches top of event queue)
-//
-caStatus casAsyncAtIOI::cbFuncAsyncIO()
-{
-	caStatus 	status;
-
-	switch (this->msg.m_cmmd) {
-	case CA_PROTO_CLAIM_CIU:
-		status = this->client.createChanResponse (this->msg, this->retVal);
-		break;
-
-	default:
-		this->reportInvalidAsynchIO (this->msg.m_cmmd);
-		status = S_cas_internal;
-		break;
-	}
-
-	return status;
-}
-