diff --git a/documentation/RELEASE_NOTES.html b/documentation/RELEASE_NOTES.html
index 47babb91bde4bf421a123ce1da1358001b84b4fd..7d1e8b8422c1256f13d24105fad0226764eda047 100644
--- a/documentation/RELEASE_NOTES.html
+++ b/documentation/RELEASE_NOTES.html
@@ -13,6 +13,12 @@
<!-- Insert new items immediately below here ... -->
+<h4>Problem with NAN values in MLST/ALST fields</h4>
+
+<p>The ai, ao, calc, calcout, dfanout, sel and sub record types could stop
+posting monitors if they got NAN values in their MLST or ALST fields. A change
+has been included so this should no longer be the case.</p>
+
<h4>MacOS build defaults changed</h4>
<p>The default build settings for darwin-x86 targets have been changed to match
diff --git a/src/rec/aiRecord.c b/src/rec/aiRecord.c
index 343d62126e2dd72f65e3b70eea1cb2552c2729ca..e6977005fb305fb8a09cb009a82fc15a82953200 100644
--- a/src/rec/aiRecord.c
+++ b/src/rec/aiRecord.c
@@ -385,7 +385,7 @@ static void monitor(aiRecord *prec)
/* check for value change */
delta = prec->mlst - prec->val;
if(delta<0.0) delta = -delta;
- if (delta > prec->mdel) {
+ if (!(delta <= prec->mdel)) { /* Handles MDEL == NAN */
/* post events for value change */
monitor_mask |= DBE_VALUE;
/* update last value monitored */
@@ -395,7 +395,7 @@ static void monitor(aiRecord *prec)
/* check for archive change */
delta = prec->alst - prec->val;
if(delta<0.0) delta = -delta;
- if (delta > prec->adel) {
+ if (!(delta <= prec->adel)) { /* Handles ADEL == NAN */
/* post events on value field for archive change */
monitor_mask |= DBE_LOG;
/* update last archive value monitored */
diff --git a/src/rec/aoRecord.c b/src/rec/aoRecord.c
index 5f8436ab24bd2236b845396003ae9e405d4085c5..bce43e3e4f1a9201eab36b5f57f72a74ffce389a 100644
--- a/src/rec/aoRecord.c
+++ b/src/rec/aoRecord.c
@@ -484,7 +484,7 @@ static void monitor(aoRecord *prec)
/* check for value change */
delta = prec->mlst - prec->val;
if(delta<0.0) delta = -delta;
- if (delta > prec->mdel) {
+ if (!(delta <= prec->mdel)) { /* Handles MDEL == NAN */
/* post events for value change */
monitor_mask |= DBE_VALUE;
/* update last value monitored */
@@ -493,7 +493,7 @@ static void monitor(aoRecord *prec)
/* check for archive change */
delta = prec->alst - prec->val;
if(delta<0.0) delta = -delta;
- if (delta > prec->adel) {
+ if (!(delta <= prec->adel)) { /* Handles ADEL == NAN */
/* post events on value field for archive change */
monitor_mask |= DBE_LOG;
/* update last archive value monitored */
diff --git a/src/rec/calcRecord.c b/src/rec/calcRecord.c
index 722ce069822a2b6d756df3256e50e6df1af4ae3d..8accf60d9d10f4d2e97d2312ad1a8c7c3d4ad9b1 100644
--- a/src/rec/calcRecord.c
+++ b/src/rec/calcRecord.c
@@ -310,7 +310,7 @@ static void monitor(calcRecord *prec)
/* check for value change */
delta = prec->mlst - prec->val;
if (delta < 0.0) delta = -delta;
- if (delta > prec->mdel) {
+ if (!(delta <= prec->mdel)) { /* Handles MDEL == NAN */
/* post events for value change */
monitor_mask |= DBE_VALUE;
/* update last value monitored */
@@ -319,7 +319,7 @@ static void monitor(calcRecord *prec)
/* check for archive change */
delta = prec->alst - prec->val;
if (delta < 0.0) delta = -delta;
- if (delta > prec->adel) {
+ if (!(delta <= prec->adel)) { /* Handles ADEL == NAN */
/* post events on value field for archive change */
monitor_mask |= DBE_LOG;
/* update last archive value monitored */
diff --git a/src/rec/calcoutRecord.c b/src/rec/calcoutRecord.c
index 0b7c78323ad3270953d1f690ba50184a8642d930..89265f3cc3b2cabfad022141901aa5c2a6fc502a 100644
--- a/src/rec/calcoutRecord.c
+++ b/src/rec/calcoutRecord.c
@@ -209,7 +209,7 @@ static long init_record(calcoutRecord *prec, int pass)
static long process(calcoutRecord *prec)
{
rpvtStruct *prpvt = prec->rpvt;
- int doOutput = 0;
+ int doOutput;
if (!prec->pact) {
prec->pact = TRUE;
@@ -231,21 +231,22 @@ static long process(calcoutRecord *prec)
doOutput = 1;
break;
case calcoutOOPT_On_Change:
- if (fabs(prec->pval - prec->val) > prec->mdel) doOutput = 1;
+ doOutput = ! (fabs(prec->pval - prec->val) <= prec->mdel);
break;
case calcoutOOPT_Transition_To_Zero:
- if ((prec->pval != 0.0) && (prec->val == 0.0)) doOutput = 1;
+ doOutput = ((prec->pval != 0.0) && (prec->val == 0.0));
break;
case calcoutOOPT_Transition_To_Non_zero:
- if ((prec->pval == 0.0) && (prec->val != 0.0)) doOutput = 1;
+ doOutput = ((prec->pval == 0.0) && (prec->val != 0.0));
break;
case calcoutOOPT_When_Zero:
- if (prec->val == 0.0) doOutput = 1;
+ doOutput = (prec->val == 0.0);
break;
case calcoutOOPT_When_Non_zero:
- if (prec->val != 0.0) doOutput = 1;
+ doOutput = (prec->val != 0.0);
break;
default:
+ doOutput = 0;
break;
}
prec->pval = prec->val;
@@ -584,7 +585,7 @@ static void monitor(calcoutRecord *prec)
/* check for value change */
delta = prec->mlst - prec->val;
if (delta<0.0) delta = -delta;
- if (delta > prec->mdel) {
+ if (!(delta <= prec->mdel)) { /* Handles MDEL == NAN */
/* post events for value change */
monitor_mask |= DBE_VALUE;
/* update last value monitored */
@@ -593,7 +594,7 @@ static void monitor(calcoutRecord *prec)
/* check for archive change */
delta = prec->alst - prec->val;
if (delta<0.0) delta = -delta;
- if (delta > prec->adel) {
+ if (!(delta <= prec->adel)) { /* Handles ADEL == NAN */
/* post events on value field for archive change */
monitor_mask |= DBE_LOG;
/* update last archive value monitored */
diff --git a/src/rec/dfanoutRecord.c b/src/rec/dfanoutRecord.c
index 672c1cccd4c66a87442fc153287086a1a39e3218..723d1a59c43e787e4ae4a98851b7423e6118d509 100644
--- a/src/rec/dfanoutRecord.c
+++ b/src/rec/dfanoutRecord.c
@@ -267,7 +267,7 @@ static void monitor(dfanoutRecord *prec)
/* check for value change */
delta = prec->mlst - prec->val;
if(delta<0) delta = -delta;
- if (delta > prec->mdel) {
+ if (!(delta <= prec->mdel)) { /* Handles MDEL == NAN */
/* post events for value change */
monitor_mask |= DBE_VALUE;
/* update last value monitored */
@@ -276,7 +276,7 @@ static void monitor(dfanoutRecord *prec)
/* check for archive change */
delta = prec->alst - prec->val;
if(delta<0) delta = -delta;
- if (delta > prec->adel) {
+ if (!(delta <= prec->adel)) { /* Handles ADEL == NAN */
/* post events on value field for archive change */
monitor_mask |= DBE_LOG;
/* update last archive value monitored */
diff --git a/src/rec/selRecord.c b/src/rec/selRecord.c
index 6bc43c227b0d417ff3221048dde0b5e5a9a9d413..6174dab3d0949e49a7639a24a75c75bf801f251c 100644
--- a/src/rec/selRecord.c
+++ b/src/rec/selRecord.c
@@ -300,7 +300,7 @@ static void monitor(selRecord *prec)
/* check for value change */
delta = prec->mlst - prec->val;
if(delta<0.0) delta = -delta;
- if (delta > prec->mdel) {
+ if (!(delta <= prec->mdel)) { /* Handles MDEL == NAN */
/* post events for value change */
monitor_mask |= DBE_VALUE;
/* update last value monitored */
@@ -309,7 +309,7 @@ static void monitor(selRecord *prec)
/* check for archive change */
delta = prec->alst - prec->val;
if(delta<0.0) delta = -delta;
- if (delta > prec->adel) {
+ if (!(delta <= prec->adel)) { /* Handles ADEL == NAN */
/* post events on value field for archive change */
monitor_mask |= DBE_LOG;
/* update last archive value monitored */
diff --git a/src/rec/subRecord.c b/src/rec/subRecord.c
index c07de569294ad35b6102f15ba282df8e4cfd8848..b16a89c3c07ce24cccc2853096c79fcbe0dd780b 100644
--- a/src/rec/subRecord.c
+++ b/src/rec/subRecord.c
@@ -353,7 +353,7 @@ static void monitor(subRecord *prec)
/* check for value change */
delta = prec->val - prec->mlst;
if (delta < 0.0) delta = -delta;
- if (delta > prec->mdel) {
+ if (!(delta <= prec->mdel)) { /* Handles MDEL == NAN */
/* post events for value change */
monitor_mask |= DBE_VALUE;
/* update last value monitored */
@@ -362,7 +362,7 @@ static void monitor(subRecord *prec)
/* check for archive change */
delta = prec->val - prec->alst;
if (delta < 0.0) delta = -delta;
- if (delta > prec->adel) {
+ if (!(delta <= prec->adel)) { /* Handles ADEL == NAN */
/* post events on value field for archive change */
monitor_mask |= DBE_LOG;
/* update last archive value monitored */