--- a/multimerge.py	Tue Jul 26 15:56:29 2016 +0300
+++ b/multimerge.py	Tue Jul 26 15:58:34 2016 +0300
@@ -376,27 +376,31 @@
 cfg.mdef("credential_file", True, cfg.is_filename, None, "client_credentials.json")
 
 
+## Check arguments
+if len(sys.argv) <= 1:
+    gcm_fatal(u"No configuration file specified.\nUsage: {0} <configfile>".format(sys.argv[0]))
+
+
 ## Read, parse and validate configuration file
-if len(sys.argv) > 1:
-    gcm_debug(3, u"Reading configuration from '{0}'.".format(sys.argv[1]))
-    try:
-        cfgparser = ConfigParser.RawConfigParser()
-        cfgparser.readfp(codecs.open(sys.argv[1], "r", "UTF-8"))
-    except Exception as e:
-        gcm_fatal(u"Failed to read configuration file '{0}': {1}".format(sys.argv[1], str(e)))
+gcm_debug(3, u"Reading configuration from '{0}'.".format(sys.argv[1]))
+try:
+    cfgparser = ConfigParser.RawConfigParser()
+    cfgparser.readfp(codecs.open(sys.argv[1], "r", "UTF-8"))
+except Exception as e:
+    gcm_fatal(u"Failed to read configuration file '{0}': {1}".format(sys.argv[1], str(e)))
 
-    # Check that the required section exists
-    section = "gcm"
-    if not cfgparser.has_section(section):
-        gcm_fatal(u"Invalid configuration, missing '{0}' section.".format(section))
+# Check that the required section exists
+section = "gcm"
+if not cfgparser.has_section(section):
+    gcm_fatal(u"Invalid configuration, missing '{0}' section.".format(section))
 
-    # Debug setting is a special case, we need to get it
-    # set before everything else, so do it here ..
-    if cfgparser.has_option(section, "debug"):
-        cfg.mset("debug", cfgparser.get(section, "debug"))
+# Debug setting is a special case, we need to get it
+# set before everything else, so do it here ..
+if cfgparser.has_option(section, "debug"):
+    cfg.mset("debug", cfgparser.get(section, "debug"))
 
-    # Parse the settings and validate
-    cfg.mread(cfgparser, section)
+# Parse the settings and validate
+cfg.mread(cfgparser, section)
 
 
 ## Validate settings