diff --git a/TBF/Properties/AssemblyInfo.cs b/TBF/Properties/AssemblyInfo.cs
index 4084ebcc0..11a6b5013 100644
--- a/TBF/Properties/AssemblyInfo.cs
+++ b/TBF/Properties/AssemblyInfo.cs
@@ -29,5 +29,5 @@ using System.Runtime.InteropServices;
 //      Build Number
 //      Revision
 //
-[assembly: AssemblyVersion("3.1.1843.0")]
-[assembly: AssemblyFileVersion("3.1.1843.0")]
+[assembly: AssemblyVersion("3.1.1845.0")]
+[assembly: AssemblyFileVersion("3.1.1845.0")]
diff --git a/TBF/Rig/TestMethods/iPerlCommunication/iPerlCommunicationSeq.cs b/TBF/Rig/TestMethods/iPerlCommunication/iPerlCommunicationSeq.cs
index 5437b6070..b7c659b0b 100644
--- a/TBF/Rig/TestMethods/iPerlCommunication/iPerlCommunicationSeq.cs
+++ b/TBF/Rig/TestMethods/iPerlCommunication/iPerlCommunicationSeq.cs
@@ -47,7 +47,7 @@ namespace TBF.Rig.TestMethods.iPerlCommunication
 		///		Event.OpArgumentError  . Target flow is out of range
 		///		Event.Error  . . . . . . Unspecified error
 		/// </returns>
-		public IList<Event> Execute(Config.Entities.Test test, int repetitionNr, TestMethodCfg cfg, iPerlCommunicationParams testParams)
+		public IList<Event> Execute(Test test, int repetitionNr, TestMethodCfg cfg, iPerlCommunicationParams testParams)
 		{
             IList<Event> e;                                 /// Events from currently running operations
             checkUiOp = new Operations.CheckUIOp(true);     /// Runs in more then one state
@@ -576,11 +576,12 @@ namespace TBF.Rig.TestMethods.iPerlCommunication
 					if (iPerl == null || ((iPerl.Q2CorrRL == 0) && (iPerl.Q2CorrLR == 0)))
 					{
 						/// Either no iPerl head or no Q2 correction
-						meterRslt.VolumeStart = oriMeterRslt.VolumeStart;
+                        meterRslt.Error = oriMeterRslt.Error;
+                        meterRslt.VolumeMeter = oriMeterRslt.VolumeMeter;
+                        meterRslt.VolumeStart = oriMeterRslt.VolumeStart;
 						meterRslt.VolumeEnd = oriMeterRslt.VolumeEnd;
-						meterRslt.VolumeMeter = oriMeterRslt.VolumeMeter;
-						meterRslt.Error = oriMeterRslt.Error;
-						meterRslt.Passed = oriMeterRslt.Passed;
+                        meterRslt.Passed = (meterRslt.Error >= tstRslt.ErrLimLo() + tstRslt.ErrLimMargin()
+                                         && meterRslt.Error <= tstRslt.ErrLimHi() - tstRslt.ErrLimMargin());
 						meterRslt.TestDone = true;
                         tstRslt.TestDone = true;
                     }
@@ -588,11 +589,13 @@ namespace TBF.Rig.TestMethods.iPerlCommunication
 					{
                         /// iPerl with Q2 correction => generate an artificial error equal to -1/10 of the original one (relative to Q2 target error)
                         double targetError = iPerl.CalibTargetQ2;
-                        meterRslt.VolumeStart = 0;
-						meterRslt.VolumeEnd = 0;
                         meterRslt.Error = targetError - 0.1 * (oriMeterRslt.Error - targetError);
                         meterRslt.VolumeMeter = oriMeterRslt.VolumeRef * (100.0 + meterRslt.Error) / 100.0;
-						meterRslt.Passed = true;
+                        meterRslt.VolumeStart = oriMeterRslt.VolumeStart;
+                        double signature = (oriMeterRslt.VolumeEnd > oriMeterRslt.VolumeStart) ? (+1) : (-1);
+                        meterRslt.VolumeEnd = meterRslt.VolumeStart + signature * meterRslt.VolumeMeter;
+                        meterRslt.Passed = (meterRslt.Error >= tstRslt.ErrLimLo() + tstRslt.ErrLimMargin()
+                                         && meterRslt.Error <= tstRslt.ErrLimHi() - tstRslt.ErrLimMargin());
 						meterRslt.TestDone = true;
                         tstRslt.TestDone = true;
                     }