diff --git a/src/barril/units/_abstractvaluewithquantity.py b/src/barril/units/_abstractvaluewithquantity.py
index 0c4c17f..97ea1e8 100644
--- a/src/barril/units/_abstractvaluewithquantity.py
+++ b/src/barril/units/_abstractvaluewithquantity.py
@@ -2,8 +2,8 @@
 from barril.units.unit_database import UnitDatabase
 from oop_ext.interface._interface import ImplementsInterface
 
-from .interfaces import IObjectWithQuantity, IQuantity
 from ._quantity import ObtainQuantity
+from .interfaces import IObjectWithQuantity, IQuantity
 
 __all__ = ["AbstractValueWithQuantityObject"]
 
@@ -201,8 +201,12 @@ def CreateCopy(self, value=None, unit=None, category=None, **kwargs):
             Returns a new scalar that's a copy of this scalar.
         """
         try:
+
             if value is None:
-                value = self.GetAbstractValue(unit)
+                if not self.HasCategory():
+                    value = self.GetAbstractValue()
+                else:
+                    value = self.GetAbstractValue(unit)
 
             if unit is None and category is None:
                 return self.CreateWithQuantity(self._quantity, value=value, **kwargs)
diff --git a/src/barril/units/_quantity.py b/src/barril/units/_quantity.py
index 1d24f98..ecfb060 100644
--- a/src/barril/units/_quantity.py
+++ b/src/barril/units/_quantity.py
@@ -677,17 +677,9 @@ def Convert(self, value, to_unit):
         :returns:
             An object with values to the passed unit.
         """
-        try:
-            return self._unit_database.Convert(
-                self._composing_categories, self._composing_units, to_unit, value
-            )
-        except:
-            return self._unit_database.Convert(
-                self._category,
-                self._CreateUnitsWithJoinedExponentsString(),
-                to_unit,
-                value,
-            )
+        return self._unit_database.Convert(
+            self._category, self._CreateUnitsWithJoinedExponentsString(), to_unit, value
+        )
 
     @classmethod
     def _GetComparison(cls, operator, use_literals=False):
diff --git a/src/barril/units/_tests/test_empty_scalar.py b/src/barril/units/_tests/test_empty_scalar.py
index 03ec48e..8550b2e 100644
--- a/src/barril/units/_tests/test_empty_scalar.py
+++ b/src/barril/units/_tests/test_empty_scalar.py
@@ -1,4 +1,6 @@
 from barril.units import Scalar
+from barril.units.unit_database import InvalidQuantityTypeError
+import pytest
 
 
 def testEmptyScalar():
@@ -11,3 +13,15 @@ def testEmptyScalar():
     assert scalar.GetValue() == 0.0
 
     assert scalar == scalar.Copy()
+
+
+def testEmptyScalarWithInitialValue():
+    # An empty scalar doesn't have a category defined
+    scalar_1 = Scalar.CreateEmptyScalar(20.0)
+
+    # When try to retrieve an empty scalar value using any unit a exception
+    # is being raised
+    with pytest.raises(InvalidQuantityTypeError):
+        _ = scalar_1.GetValue("m")
+
+    assert scalar_1.GetUnit() == ""
diff --git a/src/barril/units/_tests/test_scalar.py b/src/barril/units/_tests/test_scalar.py
index 5a0e587..aaaf305 100644
--- a/src/barril/units/_tests/test_scalar.py
+++ b/src/barril/units/_tests/test_scalar.py
@@ -384,18 +384,6 @@ class MyScalar(units.Scalar):
     assert scalar.GetFormatted() == "1.18 [m]"
 
 
-def testEmptyScalar():
-    """
-        ScalarMultiData exception when some of its scalars don't have a quantity_type
-    """
-    # An empty scalar doesn't have a category defined
-    scalar_1 = Scalar.CreateEmptyScalar(20.0)
-
-    # When try to retrieve scalar value or unit a  exception was being raised
-    assert scalar_1.GetValue("m") == 20.0
-    assert scalar_1.GetUnit() == ""
-
-
 def testCopyProperties(unit_database_well_length):
     """
         Test if the mehod SetValue is not called when copying the Scalar's properties.
@@ -411,6 +399,11 @@ def testCopyProperties(unit_database_well_length):
     assert scalar_dest.GetUnit() == unit
     assert scalar_dest.GetValue() == value
 
+    scalar_dest = scalar_source.CreateCopy(category=category, value=None, unit=unit)
+    assert scalar_dest.GetCategory() == category
+    assert scalar_dest.GetUnit() == unit
+    assert scalar_dest.GetValue() == value
+
 
 def testCopyPropertiesAndValidation(unit_database_well_length):
     category = "well-length-with-min-and-max"  # the minimum value is zero