diff --git a/src/workprover/__init__.py b/src/workprover/__init__.py
index d7cd34ac..2394af8f 100644
--- a/src/workprover/__init__.py
+++ b/src/workprover/__init__.py
@@ -47,12 +47,12 @@ class WorkProver(threading.Thread):
 
         try:
             self.availableSolvers["fast"] = fastsolver.FastSolver(codePath)
-        except:
+        except fastsolver.FastSolverError:
             pass
 
         try:
             self.availableSolvers["gpu"] = gpusolver.GPUSolver(codePath, GPUVendors)
-        except:
+        except gpusolver.GPUSolverError:
             pass
 
         try:
diff --git a/src/workprover/fastsolver.py b/src/workprover/fastsolver.py
index b443aa0c..36477678 100644
--- a/src/workprover/fastsolver.py
+++ b/src/workprover/fastsolver.py
@@ -4,6 +4,9 @@ import platform
 import subprocess
 import ctypes
 
+class FastSolverError(Exception):
+	pass
+
 def loadFastSolver(codePath):
     if hasattr(sys, "winver"):
         suffix = "-32"
@@ -13,7 +16,10 @@ def loadFastSolver(codePath):
 
         path = os.path.join(codePath, "fastsolver/libfastsolver{}.dll".format(suffix))
 
-        return ctypes.WinDLL(path)
+        try:
+            return ctypes.WinDLL(path)
+        except:
+            raise FastSolverError()
 
     makePath = os.path.join(codePath, "fastsolver")
     path = os.path.join(codePath, "fastsolver/libfastsolver.so")
@@ -21,12 +27,15 @@ def loadFastSolver(codePath):
     try:
         return ctypes.CDLL(path)
     except:
-        if not hasattr(sys, "frozen"):
+        if hasattr(sys, "frozen"):
+            raise FastSolverError()
+
+        try:
             subprocess.call(["make", "-C", makePath])
 
             return ctypes.CDLL(path)
-        else:
-            raise Exception()
+        except:
+            raise FastSolverError()
 
 class FastSolver(object):
     def __init__(self, codePath):
diff --git a/src/workprover/gpusolver.py b/src/workprover/gpusolver.py
index 59f56b04..ce258099 100644
--- a/src/workprover/gpusolver.py
+++ b/src/workprover/gpusolver.py
@@ -14,8 +14,11 @@ class GPUSolver(object):
     def __init__(self, codePath, vendors = None):
         global pyopencl, numpy
 
-        import pyopencl
-        import numpy
+        try:
+            import pyopencl
+            import numpy
+        except ImportError:
+            raise GPUSolverError()
 
         device = None
 
@@ -30,7 +33,7 @@ class GPUSolver(object):
 
                 break
         else:
-            raise Exception()
+            raise GPUSolverError()
 
         context = pyopencl.Context(devices = [device])