diff --git a/AixLib/FastHVAC/Components/Pipes/BaseClasses/PipeBase.mo b/AixLib/FastHVAC/Components/Pipes/BaseClasses/PipeBase.mo
index 2c34b25a61..0500923ca6 100644
--- a/AixLib/FastHVAC/Components/Pipes/BaseClasses/PipeBase.mo
+++ b/AixLib/FastHVAC/Components/Pipes/BaseClasses/PipeBase.mo
@@ -5,7 +5,7 @@ model PipeBase
   /* *******************************************************************
       Medium
      ******************************************************************* */
-    parameter Integer nNodes(min=3)=3 "Number of discrete flow volumes";
+    parameter Integer nNodes(min=1)=1 "Number of discrete flow volumes";
     parameter FastHVAC.Media.BaseClasses.MediumSimple medium=
       FastHVAC.Media.WaterSimple()
     "Mediums charastics  (heat capacity, density, thermal conductivity)"
diff --git a/AixLib/FastHVAC/Components/Storage/BaseClasses/HeatingCoil.mo b/AixLib/FastHVAC/Components/Storage/BaseClasses/HeatingCoil.mo
index 12186ea22b..c84205ffc4 100644
--- a/AixLib/FastHVAC/Components/Storage/BaseClasses/HeatingCoil.mo
+++ b/AixLib/FastHVAC/Components/Storage/BaseClasses/HeatingCoil.mo
@@ -1,7 +1,7 @@
 within AixLib.FastHVAC.Components.Storage.BaseClasses;
 model HeatingCoil
 
- parameter Integer dis_HC;
+ parameter Integer dis_HC(min=1);
 
   parameter Media.BaseClasses.MediumSimple medium_HC=Media.WaterSimple()
     "Mediums charastics  (heat capacity, density, thermal conductivity)";
@@ -22,7 +22,7 @@ model HeatingCoil
     parameterPipe=pipeRecordHC,
     T_0=T_start,
     length=lengthHC,
-    nNodes(min=1)=dis_HC,
+    nNodes=dis_HC,
     alphaInsideFix=alphaInsideFix,
     calculateAlpha=true)  annotation (Placement(transformation(
         extent={{-10,-10},{10,10}},
diff --git a/AixLib/package.mo b/AixLib/package.mo
index bde61f8e09..6c81ca5b8c 100644
--- a/AixLib/package.mo
+++ b/AixLib/package.mo
@@ -16,7 +16,7 @@ package AixLib
     Modelica_DeviceDrivers(version="1.4.4"),
     Modelica_Synchronous(version="0.92.1"),
     NcDataReader2(version="2.4.0")),
-  version = "0.7.1",
+  version = "0.7.2",
   conversion(from(
     version="0.3.2", script="modelica://AixLib/Resources/Scripts/ConvertAixLib_from_0.3.2_to_0.4.mos",
     version="0.5.0", script="modelica://AixLib/Resources/Scripts/ConvertAixLib_from_0.5.0_to_0.5.1.mos",