diff --git a/src/rec/recDynLink.c b/src/rec/recDynLink.c
index 6bdde03ee..875ed4a79 100644
--- a/src/rec/recDynLink.c
+++ b/src/rec/recDynLink.c
@@ -1,3 +1,14 @@
+/*recDynLink.c*/
+/*****************************************************************
+                          COPYRIGHT NOTIFICATION
+*****************************************************************
+
+(C)  COPYRIGHT 1993 UNIVERSITY OF CHICAGO
+ 
+This software was developed under a United States Government license
+described on the COPYRIGHT_UniversityOfChicago file included as part
+of this distribution.
+**********************************************************************/
 #include <vxWorks.h>
 #include <taskLib.h>
 #include <string.h>
@@ -352,6 +363,7 @@ LOCAL void connectCallback(struct connection_handler_args cha)
     dynLinkPvt	*pdynLinkPvt;
     
     precDynLink = (recDynLink *)ca_puser(cha.chid);
+    if(!precDynLink) return;
     pdynLinkPvt = precDynLink->pdynLinkPvt;
     if(ca_state(chid)==cs_conn) {
 	pdynLinkPvt->state = stateGetting;
@@ -371,8 +383,8 @@ LOCAL void getCallback(struct event_handler_args eha)
     size_t			nRequest;
     
     precDynLink = (recDynLink *)ca_puser(eha.chid);
+    if(!precDynLink) return;
     pdynLinkPvt = precDynLink->pdynLinkPvt;
-    pdynLinkPvt->state = stateConnected;
     pdynLinkPvt -> graphicLow = pdata->lower_disp_limit;
     pdynLinkPvt -> graphHigh = pdata->upper_disp_limit;
     pdynLinkPvt -> controlLow = pdata->lower_ctrl_limit;
@@ -385,7 +397,8 @@ LOCAL void getCallback(struct event_handler_args eha)
 	pdynLinkPvt->nRequest = ca_element_count(pdynLinkPvt->chid);
     }
     nRequest = pdynLinkPvt->nRequest;
-    pdynLinkPvt->pbuffer = calloc(nRequest,dbr_size[pdynLinkPvt->dbrType]);
+    pdynLinkPvt->pbuffer = calloc(nRequest,
+	dbr_size[mapNewToOld[pdynLinkPvt->dbrType]]);
     if(pdynLinkPvt->io==ioInput) {
 	SEVCHK(ca_add_array_event(
 	    dbf_type_to_DBR_TIME(mapNewToOld[pdynLinkPvt->dbrType]),
@@ -394,6 +407,7 @@ LOCAL void getCallback(struct event_handler_args eha)
 	    0.0,0.0,0.0,
 	    &pdynLinkPvt->evid),"ca_add_array_event");
     }
+    pdynLinkPvt->state = stateConnected;
     if(pdynLinkPvt->searchCallback) (pdynLinkPvt->searchCallback)(precDynLink);
 }
 
@@ -408,6 +422,7 @@ LOCAL void monitorCallback(struct event_handler_args eha)
     short	timeType;
     
     precDynLink = (recDynLink *)ca_puser(eha.chid);
+    if(!precDynLink) return;
     pdynLinkPvt = precDynLink->pdynLinkPvt;
     if(pdynLinkPvt->pbuffer) {
 	FASTLOCK(&pdynLinkPvt->lock);
@@ -482,7 +497,7 @@ LOCAL void recDynLinkOut(void)
     taskwdInsert(taskIdSelf(),NULL,NULL);
     SEVCHK(ca_task_initialize(),"ca_task_initialize");
     while(TRUE) {
-	semTake(wakeUpSem,sysClkRateGet()/10);
+	semTake(wakeUpSem,sysClkRateGet());
 	while (rngNBytes(outRingQ)>=sizeof(cmd) && interruptAccept){
 	    if(rngBufGet(outRingQ,(void *)&cmd,sizeof(cmd))
 	    !=sizeof(cmd)) {
diff --git a/src/rec/recDynLink.h b/src/rec/recDynLink.h
index e45493331..e4fe17414 100644
--- a/src/rec/recDynLink.h
+++ b/src/rec/recDynLink.h
@@ -1,3 +1,14 @@
+/*recDynLink.c*/
+/*****************************************************************
+                          COPYRIGHT NOTIFICATION
+*****************************************************************
+
+(C)  COPYRIGHT 1993 UNIVERSITY OF CHICAGO
+ 
+This software was developed under a United States Government license
+described on the COPYRIGHT_UniversityOfChicago file included as part
+of this distribution.
+*******************************************************************/
 #ifndef INCrecDynLinkh
 #define INCrecDynLinkh
 
diff --git a/src/rec/recDynLinkTest.c b/src/rec/recDynLinkTest.c
index 26fab36e1..a646f1179 100644
--- a/src/rec/recDynLinkTest.c
+++ b/src/rec/recDynLinkTest.c
@@ -1,3 +1,14 @@
+/*recDynLinkTest.c */
+/*****************************************************************
+                          COPYRIGHT NOTIFICATION
+*****************************************************************
+
+(C)  COPYRIGHT 1993 UNIVERSITY OF CHICAGO
+ 
+This software was developed under a United States Government license
+described on the COPYRIGHT_UniversityOfChicago file included as part
+of this distribution.
+***********************************************************************/
 #include <vxWorks.h>
 #include <string.h>
 #include <stdlib.h>
@@ -107,10 +118,10 @@ int recDynTestInput(char *pvname,int nRequest)
     int		options=0;
 
     if(puserPvt) {
+	recDynLinkClear(&getDynlink);
 	free(puserPvt->pbuffer);
 	free(getDynlink.puserPvt);
 	getDynlink.puserPvt = NULL;
-	recDynLinkClear(&getDynlink);
     }
     getDynlink.puserPvt = puserPvt = (userPvt *)calloc(1,sizeof(userPvt));
     puserPvt->pbuffer = calloc(nRequest,sizeof(double));
@@ -131,10 +142,10 @@ int recDynTestNewOutput(char *pvname,int nRequest)
     int		options=0;
 
     if(puserPvt) {
+	recDynLinkClear(&putDynlink);
 	free(puserPvt->pbuffer);
 	free(putDynlink.puserPvt);
 	putDynlink.puserPvt = NULL;
-	recDynLinkClear(&putDynlink);
     }
     putDynlink.puserPvt = puserPvt = (userPvt *)calloc(1,sizeof(userPvt));
     puserPvt->pbuffer = calloc(nRequest,sizeof(double));
@@ -161,10 +172,10 @@ int recDynTestClearInput(void)
 {
     userPvt	*puserPvt= getDynlink.puserPvt;
 
+    recDynLinkClear(&getDynlink);
     free(puserPvt->pbuffer);
     free(getDynlink.puserPvt);
     getDynlink.puserPvt = NULL;
-    recDynLinkClear(&getDynlink);
     return(0);
 }
 
@@ -172,9 +183,9 @@ int recDynTestClearOutput(void)
 {
     userPvt	*puserPvt= putDynlink.puserPvt;
 
+    recDynLinkClear(&putDynlink);
     free(puserPvt->pbuffer);
     free(putDynlink.puserPvt);
     putDynlink.puserPvt = NULL;
-    recDynLinkClear(&putDynlink);
     return(0);
 }