diff --git a/gillespy2/solvers/cpp/ode_c_solver.py b/gillespy2/solvers/cpp/ode_c_solver.py
index 43a59a776..4bde7118b 100644
--- a/gillespy2/solvers/cpp/ode_c_solver.py
+++ b/gillespy2/solvers/cpp/ode_c_solver.py
@@ -19,7 +19,8 @@
 
 from gillespy2.solvers.cpp.c_decoder import BasicSimDecoder
 from gillespy2.solvers.utilities import solverutils as cutils
-from gillespy2.core import GillesPySolver, gillespyError, Model
+from gillespy2.core import GillesPySolver, Model
+from gillespy2.core.gillespyError import *
 from gillespy2.core import Results
 
 from .c_solver import CSolver, SimulationReturnCode
diff --git a/gillespy2/solvers/cpp/ssa_c_solver.py b/gillespy2/solvers/cpp/ssa_c_solver.py
index 34867e40e..7aa81d2e7 100644
--- a/gillespy2/solvers/cpp/ssa_c_solver.py
+++ b/gillespy2/solvers/cpp/ssa_c_solver.py
@@ -20,7 +20,8 @@
 
 from gillespy2.solvers.cpp.c_decoder import IterativeSimDecoder
 from gillespy2.solvers.utilities import solverutils as cutils
-from gillespy2.core import GillesPySolver, gillespyError, Model
+from gillespy2.core import GillesPySolver, Model
+from gillespy2.core.gillespyError import *
 from gillespy2.core import Results
 
 from .c_solver import CSolver, SimulationReturnCode
diff --git a/gillespy2/solvers/cpp/tau_hybrid_c_solver.py b/gillespy2/solvers/cpp/tau_hybrid_c_solver.py
index f3d41a02f..a18a9b850 100644
--- a/gillespy2/solvers/cpp/tau_hybrid_c_solver.py
+++ b/gillespy2/solvers/cpp/tau_hybrid_c_solver.py
@@ -1,7 +1,8 @@
 import gillespy2
 from gillespy2.solvers.cpp.c_decoder import IterativeSimDecoder
 from gillespy2.solvers.utilities import solverutils as cutils
-from gillespy2.core import GillesPySolver, gillespyError, Model
+from gillespy2.core import GillesPySolver, Model
+from gillespy2.core.gillespyError import *
 from typing import Union
 from gillespy2.core import Results
 
diff --git a/gillespy2/solvers/cpp/tau_leaping_c_solver.py b/gillespy2/solvers/cpp/tau_leaping_c_solver.py
index c56a98ea9..36d1d34aa 100644
--- a/gillespy2/solvers/cpp/tau_leaping_c_solver.py
+++ b/gillespy2/solvers/cpp/tau_leaping_c_solver.py
@@ -19,7 +19,8 @@
 
 from gillespy2.solvers.cpp.c_decoder import IterativeSimDecoder
 from gillespy2.solvers.utilities import solverutils as cutils
-from gillespy2.core import GillesPySolver, gillespyError, Model
+from gillespy2.core import GillesPySolver, Model
+from gillespy2.core.gillespyError import *
 from gillespy2.core import Results 
 
 from .c_solver import CSolver, SimulationReturnCode
diff --git a/gillespy2/solvers/numpy/ode_solver.py b/gillespy2/solvers/numpy/ode_solver.py
index acd5efc58..957346903 100644
--- a/gillespy2/solvers/numpy/ode_solver.py
+++ b/gillespy2/solvers/numpy/ode_solver.py
@@ -22,7 +22,7 @@
 from scipy.integrate import ode
 from collections import OrderedDict
 import numpy as np
-from gillespy2.core import GillesPySolver, log, gillespyError
+from gillespy2.core import GillesPySolver, log, gillespyError, SimulationError
 from gillespy2.solvers.utilities import solverutils as nputils
 from gillespy2.core.results import Results
 
diff --git a/gillespy2/solvers/numpy/ssa_solver.py b/gillespy2/solvers/numpy/ssa_solver.py
index 5056b6fba..46c1984cf 100644
--- a/gillespy2/solvers/numpy/ssa_solver.py
+++ b/gillespy2/solvers/numpy/ssa_solver.py
@@ -18,7 +18,8 @@
 
 from threading import Thread, Event
 from gillespy2.core.results import Results
-from gillespy2.core import GillesPySolver, log, gillespyError
+from gillespy2.core import GillesPySolver, log
+from gillespy2.core.gillespyError import *
 from gillespy2.solvers.utilities import solverutils as nputils
 import random
 import math
diff --git a/gillespy2/solvers/numpy/tau_leaping_solver.py b/gillespy2/solvers/numpy/tau_leaping_solver.py
index 09e510af7..a54766a47 100644
--- a/gillespy2/solvers/numpy/tau_leaping_solver.py
+++ b/gillespy2/solvers/numpy/tau_leaping_solver.py
@@ -24,7 +24,7 @@
 from gillespy2.solvers.utilities import Tau
 from gillespy2.solvers.utilities import solverutils as nputils
 from gillespy2.core import GillesPySolver, log, liveGraphing
-from gillespy2.core import ModelError, ExecutionError
+from gillespy2.core.gillespyError import *
 from gillespy2.core.results import Results
 
 class TauLeapingSolver(GillesPySolver):