diff --git a/oscar/SleepLib/day.cpp b/oscar/SleepLib/day.cpp
index 30b97cc1..740f7899 100644
--- a/oscar/SleepLib/day.cpp
+++ b/oscar/SleepLib/day.cpp
@@ -1514,6 +1514,31 @@ QString Day::getPressureRelief()
     ChannelID pr_level_chan = loader->PresReliefLevel();
     ChannelID pr_mode_chan = loader->PresReliefMode();
 
+    // Separate calculation for SleepStyle machines
+    if (mach->info.loadername == "SleepStyle") {
+        pr_str = loader->PresReliefLabel();
+
+        int pr_level = -1;
+        if (pr_level_chan != NoChannel && settingExists(pr_level_chan)) {
+            pr_level = qRound(settings_wavg(pr_level_chan));
+        }
+        if (pr_level == -1)
+            return STR_TR_None;
+
+        if ((pr_mode_chan != NoChannel) && settingExists(pr_mode_chan)) {
+            schema::Channel & chan = schema::channel[pr_level_chan];
+            QString level = chan.option(pr_level);
+            if (level.isEmpty()) {
+                level = QString().number(pr_level) + " " + chan.units();
+            if (settings_min(pr_level_chan) != settings_max(pr_level_chan))
+                level = QObject::tr("varies");
+            }
+            pr_str += QString(" %1").arg(level);
+        }
+
+        return pr_str;
+    }
+
     if ((pr_mode_chan != NoChannel) && settingExists(pr_mode_chan)) {
         // TODO: This is an awful hack that depends on the enum ordering of the pressure relief mode.
         // See the comment in getCPAPModeStr().
diff --git a/oscar/SleepLib/loader_plugins/prs1_parser_asv.cpp b/oscar/SleepLib/loader_plugins/prs1_parser_asv.cpp
index a5fb6526..f13ce76c 100644
--- a/oscar/SleepLib/loader_plugins/prs1_parser_asv.cpp
+++ b/oscar/SleepLib/loader_plugins/prs1_parser_asv.cpp
@@ -1260,7 +1260,7 @@ bool PRS1DataChunk::ParseSettingsF5V3(const unsigned char* data, int size)
                     breath_rate = data[pos+1];
                     timed_inspiration = data[pos+2];
                     if (breath_rate < 4 || breath_rate > 16) UNEXPECTED_VALUE(breath_rate, "4-16");
-                    if (timed_inspiration < 12 || timed_inspiration > 24) UNEXPECTED_VALUE(timed_inspiration, "12-24");
+                    if (timed_inspiration < 12 || timed_inspiration > 25) UNEXPECTED_VALUE(timed_inspiration, "12-25");
                     this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_BACKUP_BREATH_MODE, PRS1Backup_Fixed));
                     this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_BACKUP_BREATH_RATE, breath_rate));  // BPM
                     this->AddEvent(new PRS1ScaledSettingEvent(PRS1_SETTING_BACKUP_TIMED_INSPIRATION, timed_inspiration, 0.1));
diff --git a/oscar/SleepLib/loader_plugins/prs1_parser_xpap.cpp b/oscar/SleepLib/loader_plugins/prs1_parser_xpap.cpp
index c5643505..9f2e9b6f 100644
--- a/oscar/SleepLib/loader_plugins/prs1_parser_xpap.cpp
+++ b/oscar/SleepLib/loader_plugins/prs1_parser_xpap.cpp
@@ -1100,10 +1100,12 @@ bool PRS1DataChunk::ParseSettingsF0V45(const unsigned char* data, int size)
     // TODO: Where is altitude compensation set? We've seen it on 261CA.
 
     CHECK_VALUE(data[0x10], 0);
+    int autotrial_duration = data[0x11];
     if (cpapmode == PRS1_MODE_AUTOTRIAL) {
-        CHECK_VALUE(data[0x11], 7);  // 7-day duration?
+        CHECK_VALUES(autotrial_duration, 7, 30);
+        this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_AUTO_TRIAL, autotrial_duration));
     } else {
-        CHECK_VALUE(data[0x11], 0);
+        CHECK_VALUE(autotrial_duration, 0);
     }
 
     return true;
diff --git a/oscar/SleepLib/loader_plugins/sleepstyle_loader.cpp b/oscar/SleepLib/loader_plugins/sleepstyle_loader.cpp
index 0217bd6f..43b2c779 100644
--- a/oscar/SleepLib/loader_plugins/sleepstyle_loader.cpp
+++ b/oscar/SleepLib/loader_plugins/sleepstyle_loader.cpp
@@ -686,9 +686,12 @@ bool SleepStyleLoader::OpenSummary(Machine *mach, const QString & filename)
             }
 
             if (EPRLevel == 0)
-                sess->settings[SS_EPR] = 0;
-            else
+                sess->settings[SS_EPR] = 0;     // Show EPR off
+            else {
                 sess->settings[SS_EPRLevel] = EPRLevel;
+                sess->settings[SS_EPR] = 1;
+            }
+
             sess->settings[SS_Humidity] = humidityLevel;
             sess->settings[SS_Ramp] = ramp;
 
@@ -858,6 +861,7 @@ bool SleepStyleLoader::OpenDetail(Machine *mach, const QString & filename)
                 a5 = data[idx + 6];   // [0..5] UF2,  [6..7] Unknown
 
                 // SenseAwake bits are in the first two bits of the last three data fields
+                // TODO: Confirm that the bits are in the right order
                 a6 = (a3 >> 6) << 4 | ((a4 >> 6) << 2) | (a5 >> 6);
 
                 // See if extra bits from the first two fields are used at any time (see debug later)
@@ -865,6 +869,7 @@ bool SleepStyleLoader::OpenDetail(Machine *mach, const QString & filename)
 
                 bitmask = 1;
                 for (int k = 0; k < 6; k++) {  // There are 6 flag sets per 2 minutes
+                    // TODO: Modify if all four channels are to be reported separately
                     if (a1 & bitmask) {  A->AddEvent(ti+60000, 0); } // Grouped by F&P as A
                     if (a2 & bitmask) {  A->AddEvent(ti+60000, 0); } // Grouped by F&P as A
                     if (a3 & bitmask) {  H->AddEvent(ti+60000, 0); } // Grouped by F&P as H
@@ -900,6 +905,9 @@ bool SleepStyleLoader::OpenDetail(Machine *mach, const QString & filename)
     return 1;
 }
 
+ChannelID SleepStyleLoader::PresReliefMode() { return SS_EPR; }
+ChannelID SleepStyleLoader::PresReliefLevel() { return SS_EPRLevel; }
+
 void SleepStyleLoader::initChannels()
 {
     using namespace schema;
@@ -922,7 +930,7 @@ void SleepStyleLoader::initChannels()
 
     channel.add(GRP_CPAP, chan = new Channel(SS_EPRLevel = 0xf307, SETTING,  MT_CPAP,  SESSION,
         "EPRLevel-ss", QObject::tr("EPR Level"), QObject::tr("Exhale Pressure Relief Level"), QObject::tr("EPR Level"),
-        "", INTEGER, Qt::black));
+        STR_UNIT_CMH2O, INTEGER, Qt::black));
     chan->addOption(0, STR_TR_Off);
 
     channel.add(GRP_CPAP, chan = new Channel(SS_Ramp = 0xf308, SETTING, MT_CPAP,   SESSION,
diff --git a/oscar/SleepLib/loader_plugins/sleepstyle_loader.h b/oscar/SleepLib/loader_plugins/sleepstyle_loader.h
index 9196d0ce..cc576e73 100644
--- a/oscar/SleepLib/loader_plugins/sleepstyle_loader.h
+++ b/oscar/SleepLib/loader_plugins/sleepstyle_loader.h
@@ -94,9 +94,10 @@ class SleepStyleLoader : public CPAPLoader
     ////////////////////////////////////////////////////////////////////////////////////////////////////////////
     // Now for some CPAPLoader overrides
     ////////////////////////////////////////////////////////////////////////////////////////////////////////////
-    virtual QString presRelType() { return QObject::tr("EPR"); }
-    virtual ChannelID presReliefMode() { return SS_EPR; }
-    virtual ChannelID PresReliefLevel() { return SS_EPRLevel; }
+//    virtual QString presRelType() { return QObject::tr("EPR"); }
+    virtual QString PresReliefLabel() { return QObject::tr("EPR: "); }
+    virtual ChannelID PresReliefMode();
+    virtual ChannelID PresReliefLevel();
     ////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
   protected:
diff --git a/oscar/SleepLib/session.cpp b/oscar/SleepLib/session.cpp
index 3ef97a20..6fd2e375 100644
--- a/oscar/SleepLib/session.cpp
+++ b/oscar/SleepLib/session.cpp
@@ -1635,6 +1635,7 @@ EventDataType Session::rangeCount(ChannelID id, qint64 first, qint64 last)
     if (id == AllAhiChannels) {
         for (int i = 0; i < ahiChannels.size(); i++)
             total += rangeCount(ahiChannels.at(i), first, last);
+        return (EventDataType)total;
     }
 
     QHash<ChannelID, QVector<EventList *> >::iterator j = eventlist.find(id);
diff --git a/oscar/VERSION b/oscar/VERSION
index 0873c54f..6883ccb0 100644
--- a/oscar/VERSION
+++ b/oscar/VERSION
@@ -1,4 +1,4 @@
 // Update the string below to set OSCAR's version and release status.
 // See https://semver.org/spec/v2.0.0.html for details on format.
 
-#define VERSION "1.2.1-alpha.2"
+#define VERSION "1.2.1-alpha.4"