diff --git a/src/ca/access.c b/src/ca/access.c
index c073e1f68..0dfda8842 100644
--- a/src/ca/access.c
+++ b/src/ca/access.c
@@ -134,6 +134,7 @@ static char *sccsId = "@(#) $Id$";
 
 #include 	"iocinf.h"
 #include	"net_convert.h"
+#include	<epicsPrint.h>
 #include	<stdarg.h> /* for VMS old CC include order madness */
 
 
@@ -3384,7 +3385,7 @@ int ca_channel_status(int tid)
  * ca_replace_printf_handler ()
  */
 int APIENTRY ca_replace_printf_handler (
-int (*ca_printf_func)(char *pformat, va_list args)
+int (*ca_printf_func)(const char *pformat, va_list args)
 )
 {
 	if (ca_printf_func) {
@@ -3406,13 +3407,13 @@ int (*ca_printf_func)(char *pformat, va_list args)
  */
 int ca_printf(char *pformat, ...)
 {
-	int		(*ca_printf_func)(char *pformat, va_list args);
+	int		(*ca_printf_func)(const char *pformat, va_list args);
 	va_list		theArgs;
 	int		status;
 
 	va_start(theArgs, pformat);
 
-	ca_printf_func = ca_default_printf;
+	ca_printf_func = epicsVprintf;
 	if (ca_static) {
 		if (ca_static->ca_printf_func) {
 			ca_printf_func = ca_static->ca_printf_func;
@@ -3426,21 +3427,3 @@ int ca_printf(char *pformat, ...)
 	return status;
 }
 
-
-/*
- *      ca_default_printf()
- *	(this default is replaced under vxWorks
- *	- see vxWorks_depen.c)
- */
-int ca_default_printf(char *pformat, va_list args)
-{
-        int             status;
-
-        status = vfprintf(
-                        stderr,
-                        pformat,
-                        args);
-        return status;
-}
-
-
diff --git a/src/ca/acctst.c b/src/ca/acctst.c
index 2a60b48d2..79dd17267 100644
--- a/src/ca/acctst.c
+++ b/src/ca/acctst.c
@@ -9,9 +9,14 @@ static char *sccsId = "@(#) $Id$";
 #include <LIB$ROUTINES.H>
 #endif
 
+/*
+ * ANSI
+ */
 #include	<stdio.h>
 #include	<stdlib.h>
 #include	<assert.h>
+#include	<math.h>
+#include	<float.h>
 
 #include	"os_depen.h"
 
@@ -219,22 +224,22 @@ int doacctst(char *pname)
 
 		double 	dval = 3.3;
 		float	fval = -8893.3;
-		double	dret;
-		float	fret;
+		double	dret = DBL_MAX;
+		float	fret = FLT_MAX;
 
 		status = ca_put(DBR_DOUBLE, chix1, &dval);
 		SEVCHK(status, NULL);
 		status = ca_get(DBR_DOUBLE, chix1, &dret);
 		SEVCHK(status, NULL);
 		ca_pend_io(30.0);
-		assert(dval - dret < .000001);
+		assert( fabs(dval-dret) < DBL_EPSILON*4);
 
 		status = ca_put(DBR_FLOAT, chix1, &fval);
 		SEVCHK(status, NULL);
 		status = ca_get(DBR_FLOAT, chix1, &fret);
 		SEVCHK(status, NULL);
 		ca_pend_io(30.0);
-		assert(fval - fret < .0001);
+		assert( fabs(fval-fret) < FLT_EPSILON*4);
 	}
 
 	/*
diff --git a/src/ca/iocinf.h b/src/ca/iocinf.h
index d69b20cd7..efc3a6a19 100644
--- a/src/ca/iocinf.h
+++ b/src/ca/iocinf.h
@@ -100,6 +100,7 @@ HDRVERSIONID(iocinfh, "$Id$")
 #include <bucketLib.h>
 #include <ellLib.h> 
 #include <envDefs.h> 
+#include <epicsPrint.h> 
 
 /*
  * CA private includes 
@@ -410,7 +411,7 @@ struct  ca_static{
 	void		(*ca_connection_func)
 				(struct connection_handler_args);
 	void		*ca_connection_arg;
-	int		(*ca_printf_func)(char *pformat, va_list args);
+	int		(*ca_printf_func)(const char *pformat, va_list args);
 	void		(*ca_fd_register_func)
 				(void *, SOCKET, int);
 	void		*ca_fd_register_arg;
@@ -594,7 +595,6 @@ ca_time cac_time_sum(ca_time *pTVA, ca_time *pTVB);
 void caIOBlockFree(evid pIOBlock);
 void clearChannelResources(unsigned id);
 void caSetDefaultPrintfHandler ();
-int ca_default_printf(char *pformat, va_list args);
 
 /*
  * !!KLUDGE!!
diff --git a/src/ca/posix_depen.c b/src/ca/posix_depen.c
index f8590a4f8..c95bd87d0 100644
--- a/src/ca/posix_depen.c
+++ b/src/ca/posix_depen.c
@@ -279,6 +279,6 @@ void ca_spawn_repeater()
  */
 void caSetDefaultPrintfHandler ()
 {
-        ca_static->ca_printf_func = ca_default_printf;
+        ca_static->ca_printf_func = epicsVprintf;
 }
 
diff --git a/src/ca/vms_depen.c b/src/ca/vms_depen.c
index d15227fce..bb3868c28 100644
--- a/src/ca/vms_depen.c
+++ b/src/ca/vms_depen.c
@@ -317,6 +317,6 @@ void caHostFromInetAddr(struct in_addr *pnet_addr, char *pBuf, unsigned size)
  */
 void caSetDefaultPrintfHandler ()
 {
-        ca_static->ca_printf_func = ca_default_printf;
+        ca_static->ca_printf_func = epicsVprintf;
 }
 
diff --git a/src/ca/vxWorks_depen.c b/src/ca/vxWorks_depen.c
index 886417684..0eef64d87 100644
--- a/src/ca/vxWorks_depen.c
+++ b/src/ca/vxWorks_depen.c
@@ -34,7 +34,6 @@
 #include <callback.h>
 #include "iocinf.h"
 #include "remLib.h"
-#include <mprintf.h>
 
 LOCAL void ca_repeater_task();
 LOCAL void ca_task_exit_tcb(WIND_TCB *ptcb);
@@ -892,6 +891,6 @@ void cac_recv_task(int  tid)
  */
 void caSetDefaultPrintfHandler ()
 {
-	ca_static->ca_printf_func = vmprintf;
+	ca_static->ca_printf_func = epicsVprintf;
 }
 
diff --git a/src/ca/windows_depen.c b/src/ca/windows_depen.c
index db8b37f6d..b771bf3f8 100644
--- a/src/ca/windows_depen.c
+++ b/src/ca/windows_depen.c
@@ -251,7 +251,7 @@ void ca_spawn_repeater()
  */
 void caSetDefaultPrintfHandler ()
 {
-        ca_static->ca_printf_func = ca_default_printf;
+        ca_static->ca_printf_func = epicsVprintf;
 }