diff -ur "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Assemblies.mo" "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Assemblies.mo"
--- "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Assemblies.mo"	2022-03-10 09:57:41.760144603 +0000
+++ "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Assemblies.mo"	2022-03-10 09:58:08.260147960 +0000
@@ -480,7 +480,7 @@
             caCL(subregions(graphite(each inclDL=true, 'e-Transfer'(each fromI=
                         false)), ionomer(H2O(each lambda_IC=13.53))))),
           redeclare Modelica.Electrical.Analog.Sources.SineCurrent load(
-            freqHz=0.3,
+            f =0.3,
             I=7,
             offset=4),
           testConditions(I_an=15*U.A, I_ca=20*U.A));
@@ -544,7 +544,7 @@
               stateSelect=StateSelect.always,
               fixed=true)));
 
-        output Modelica.SIunits.Voltage w_V=load.v "Potential in volts";
+        output Modelica.Units.SI.Voltage w_V=load.v "Potential in volts";
 
       equation
         der(load.i) = 0 "Current is a dummy state -- only for linear analysis.";
diff -ur "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Blocks.mo" "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Blocks.mo"
--- "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Blocks.mo"	2022-03-10 09:57:41.760144603 +0000
+++ "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Blocks.mo"	2022-03-10 09:58:07.496147863 +0000
@@ -56,7 +56,7 @@
       extends Partial;
 
       replaceable function f = U.from_degC constrainedby
-        Modelica.SIunits.Conversions.ConversionIcon "Conversion function"
+        Modelica.Units.Icons.Conversion "Conversion function"
         annotation (__Dymola_choicesFromPackage=true);
 
     equation
diff -ur "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Chemistry.mo" "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Chemistry.mo"
--- "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Chemistry.mo"	2022-03-10 09:57:41.760144603 +0000
+++ "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Chemistry.mo"	2022-03-10 09:58:07.292147838 +0000
@@ -30,7 +30,7 @@
         inclTransZ=false,
         chemical(redeclare constant Integer n_trans=1),
         redeclare Modelica.Blocks.Sources.Sine set(
-          freqHz=1,
+          f =1,
           amplitude=100*U.A,
           phase=1.5707963267949)) annotation (Placement(transformation(
             extent={{-10,-10},{10,10}},
diff -ur "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Conditions.mo" "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Conditions.mo"
--- "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Conditions.mo"	2022-03-10 09:57:41.760144603 +0000
+++ "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Conditions.mo"	2022-03-10 09:58:06.944147794 +0000
@@ -1794,7 +1794,7 @@
             annotation (Placement(transformation(extent={{-50,-10},{-30,10}}),
                 iconTransformation(extent={{-50,-10},{-30,10}})));
 
-          Modelica.SIunits.MassFraction X[MixtureMedium.nX]
+          Modelica.Units.SI.MassFraction X[MixtureMedium.nX]
             "Mass fractions within the mixture";
 
         equation
@@ -1836,7 +1836,7 @@
                 Modelica.Media.IdealGases.Common.FluidData.H2O},
             substanceNames={"H2","H2O"},
             reference_X=fill(1/nX, nX),
-            referenceChoice=Modelica.Media.Interfaces.PartialMedium.Choices.ReferenceEnthalpy.ZeroAt25C,
+            referenceChoice=Modelica.Media.Interfaces.Choices.ReferenceEnthalpy.ZeroAt25C,
 
             excludeEnthalpyOfFormation=false);
 
@@ -1856,7 +1856,7 @@
 
             substanceNames={"H2O","N2","O2"},
             reference_X=fill(1/nX, nX),
-            referenceChoice=Modelica.Media.Interfaces.PartialMedium.Choices.ReferenceEnthalpy.ZeroAt25C,
+            referenceChoice=Modelica.Media.Interfaces.Choices.ReferenceEnthalpy.ZeroAt25C,
 
             excludeEnthalpyOfFormation=false);
 
diff -ur "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Subregions.mo" "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Subregions.mo"
--- "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Subregions.mo"	2022-03-10 09:57:41.772144605 +0000
+++ "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Subregions.mo"	2022-03-10 09:58:01.876147151 +0000
@@ -587,7 +587,7 @@
             redeclare Modelica.Blocks.Sources.Sine materialSet(
               amplitude=0.2*Vdot_large,
               offset=Vdot_large,
-              freqHz=1),
+f              =1),
             redeclare function materialSpec =
                 Conditions.ByConnector.Boundary.Single.Material.volumeRate (
                   redeclare package Data = FCSys.Characteristics.H2O.Liquid),
diff -ur "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Units.mo" "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Units.mo"
--- "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/Units.mo"	2022-03-10 09:57:41.772144605 +0000
+++ "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/Units.mo"	2022-03-10 09:58:00.916147030 +0000
@@ -1258,7 +1258,7 @@
 
   function from_degC
     "Convert from temperature in degree Celsius to temperature as a quantity"
-    extends Modelica.SIunits.Icons.Conversion;
+    extends Modelica.Units.Icons.Conversion;
 
     input Real T_degC "Temperature in degree Celsius";
     output Q.TemperatureAbsolute T "Thermodynamic temperature";
@@ -1270,7 +1270,7 @@
 
   function to_degC
     "Convert from temperature as a quantity to temperature in degree Celsius"
-    extends Modelica.SIunits.Icons.Conversion;
+    extends Modelica.Units.Icons.Conversion;
 
     input Q.TemperatureAbsolute T "Thermodynamic temperature";
     output Real T_degC "Temperature in degree Celsius";
@@ -1282,7 +1282,7 @@
 
   function from_kPag
     "Convert from gauge pressure in kilopascals to absolute pressure as a quantity"
-    extends Modelica.SIunits.Icons.Conversion;
+    extends Modelica.Units.Icons.Conversion;
 
     input Real p_kPag "Gauge pressure in kilopascals";
     output Q.PressureAbsolute p "Absolute pressure";
@@ -1294,7 +1294,7 @@
 
   function to_kPag
     "Convert from absolute pressure as a quantity to gauge pressure in kilopascals"
-    extends Modelica.SIunits.Icons.Conversion;
+    extends Modelica.Units.Icons.Conversion;
 
     input Q.PressureAbsolute p "Absolute pressure";
     output Real p_kPag "Gauge pressure in kilopascals";
diff -ur "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/openmodelica.metadata.json" "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/openmodelica.metadata.json"
--- "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/openmodelica.metadata.json"	2022-03-10 09:57:41.792144607 +0000
+++ "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/openmodelica.metadata.json"	2022-03-10 09:58:08.300147965 +0000
@@ -1 +1 @@
-{"path":"FCSys 0.2.6", "sha":"cb4b17f34313b9d8f2d4223d5365684b4dc1ab65", "support":"obsolete", "uses":{"Modelica":"3.2.1"}, "version":"0.2.6", "zipfile":"https://github.com/kdavies4/FCSys/archive/cb4b17f34313b9d8f2d4223d5365684b4dc1ab65.zip"}
+{"path": "FCSys 0.2.6", "sha": "cb4b17f34313b9d8f2d4223d5365684b4dc1ab65", "support": "obsolete", "uses": {"Modelica": "4.0.0"}, "version": "0.2.6", "zipfile": "https://github.com/kdavies4/FCSys/archive/cb4b17f34313b9d8f2d4223d5365684b4dc1ab65.zip", "extraInfo": "Conversion script /home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om//Resources/Scripts/Conversion/ConvertModelica_from_3.2.3_to_4.0.0.mos was applied"}
\ No newline at end of file
diff -ur "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/package.mo" "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/package.mo"
--- "/home/hudson/saved_omc/libraries/.openmodelica/libraries/FCSys 0.2.6/package.mo"	2022-03-10 09:57:41.792144607 +0000
+++ "converted-libraries/.openmodelica/libraries/FCSys 0.2.6/package.mo"	2022-03-10 09:58:08.292147964 +0000
@@ -42,7 +42,7 @@
 
 annotation (
   preferredView="info",
-  uses(Modelica(version="3.2.1")),
+  uses(Modelica(version= "4.0.0")),
   Commands(executeCall=FCSys.Units.setup() "Re-initialize the units."),
   Documentation(info="<html>
     <p><a href=\"modelica://FCSys\">FCSys</a> is a free, open-source library of
