diff -ru a/catfish/CatfishSearchEngine.py b/catfish/CatfishSearchEngine.py
--- a/catfish/CatfishSearchEngine.py	2015-08-09 00:28:49.663912007 +0200
+++ b/catfish/CatfishSearchEngine.py	2015-08-09 00:33:28.291919320 +0200
@@ -422,10 +422,13 @@
             command = [item.replace('%keywords', keywords.lower())
                        for item in self.command]
         command = [item.replace('%path', path) for item in command]
-        self.process = subprocess.Popen(command, stdout=subprocess.PIPE,
-                                        stderr=subprocess.PIPE, shell=False)
-        self.pid = self.process.pid
-        return self.process_output(self.process.stdout)
+        try:
+            self.process = subprocess.Popen(command, stdout=subprocess.PIPE,
+                                            stderr=subprocess.PIPE, shell=False)
+            self.pid = self.process.pid
+            return self.process_output(self.process.stdout)
+        except OSError:
+            return False
 
     def process_output(self, output):
         """Return the output text."""