diff --git a/glymur/lib/config.py b/glymur/lib/config.py
index fdb5a92..04aece2 100644
--- a/glymur/lib/config.py
+++ b/glymur/lib/config.py
@@ -73,7 +73,6 @@ def load_openjpeg(path):
 
     return load_library_handle(path)
 
-
 def load_openjp2(path):
     """Load the openjp2 library, falling back on defaults if necessary.
     """
@@ -100,7 +99,7 @@ def load_openjp2(path):
 def load_library_handle(path):
     """Load the library, return the ctypes handle."""
 
-    if path is None:
+    if path is None or path in ['None', 'none']:
         # Either could not find a library via ctypes or user-configuration-file,
         # or we could not find it in any of the default locations.
         # This is probably a very old linux.
@@ -130,14 +129,11 @@ def read_config_file():
         # Read the configuration file for the library location.
         parser = ConfigParser()
         parser.read(filename)
-        try:
-            lib['openjp2'] = parser.get('library', 'openjp2')
-        except NoOptionError:
-            pass
-        try:
-            lib['openjpeg'] = parser.get('library', 'openjpeg')
-        except NoOptionError:
-            pass
+        for name in ['openjp2', 'openjpeg']:
+            try:
+                lib[name] = parser.get('library', name)
+            except NoOptionError:
+                pass
 
     return lib
 
@@ -150,8 +146,7 @@ def glymur_config():
     libopenjpeg_handle = load_openjpeg(libs['openjpeg'])
     if libopenjp2_handle is None and libopenjpeg_handle is None:
         msg = "Neither the openjp2 nor the openjpeg library could be loaded.  "
-        msg += "Operating in severely degraded mode."
-        warnings.warn(msg, UserWarning)
+        raise IOError(msg)
     return libopenjp2_handle, libopenjpeg_handle
 
 
diff --git a/glymur/test/test_opj_suite_write.py b/glymur/test/test_opj_suite_write.py
index fa719fc..ebdce2e 100644
--- a/glymur/test/test_opj_suite_write.py
+++ b/glymur/test/test_opj_suite_write.py
@@ -24,8 +24,9 @@ from .fixtures import opj_data_file
 from .fixtures import WARNING_INFRASTRUCTURE_ISSUE, WARNING_INFRASTRUCTURE_MSG
 from . import fixtures
 
-from glymur import Jp2k
 import glymur
+from glymur import Jp2k
+from glymur.codestream import SIZsegment
 
 class CinemaBase(fixtures.MetadataBase):
 
@@ -45,7 +46,7 @@ class CinemaBase(fixtures.MetadataBase):
                 'xytsiz': image_size, 'xytosiz': (0, 0),
                 'bitdepth': (12, 12, 12), 'signed': (False, False, False),
                 'xyrsiz': [(1, 1, 1), (1, 1, 1)]}
-        self.verifySizSegment(c.segment[1], glymur.codestream.SIZsegment(**kwargs))
+        self.verifySizSegment(codestream.segment[1], SIZsegment(**kwargs))
 
         self.verify_cinema_cod(codestream.segment[2])
 
@@ -55,7 +56,7 @@ class CinemaBase(fixtures.MetadataBase):
                 'xytsiz': image_size, 'xytosiz': (0, 0),
                 'bitdepth': (12, 12, 12), 'signed': (False, False, False),
                 'xyrsiz': [(1, 1, 1), (1, 1, 1)]}
-        self.verifySizSegment(c.segment[1], glymur.codestream.SIZsegment(**kwargs))
+        self.verifySizSegment(codestream.segment[1], SIZsegment(**kwargs))
 
         self.verify_cinema_cod(codestream.segment[2])