diff --git a/gprMax/exceptions.py b/gprMax/exceptions.py
index 67710407..6b087a20 100644
--- a/gprMax/exceptions.py
+++ b/gprMax/exceptions.py
@@ -16,6 +16,10 @@
 # You should have received a copy of the GNU General Public License
 # along with gprMax.  If not, see <http://www.gnu.org/licenses/>.
 
+class GeneralError(ValueError):
+    """Handles general errors. Subclasses the ValueError class."""
+    pass
+
 class CmdInputError(ValueError):
     """Handles errors in user specified commands. Subclasses the ValueError class."""
     pass
\ No newline at end of file