--- a/tool/CommandConfig.cpp	Thu Mar 19 08:42:33 2009 +0000
+++ b/tool/CommandConfig.cpp	Thu Mar 19 08:43:05 2009 +0000
@@ -105,6 +105,12 @@
 {
     ConfigList configs;
 
+    if (args.size()) {
+        stringstream err;
+        err << "'" << getName() << "' takes no arguments!";
+        throwInvalidUsageException(err);
+    }
+
     m.open(MasterDevice::Read);
     configs = selectedConfigs(m);