diff --git a/grim.py b/grim.py
index 910056a02f69651f58c3c49b603516585ff2eebf..941ca09c9baf829d39a09bf019192cb590987f27 100755
--- a/grim.py
+++ b/grim.py
@@ -21,20 +21,31 @@ def type_selector(type):
     if 'single' in type:
         return 'SINGLE CHOICE QUESTION'
 
+
 def file_exists(path):
     if not os.path.exists(path):
         msg = 'The script "{}" does not exist.'.format(path)
         raise argparse.ArgumentTypeError(msg)
     return path
 
+def script_is_valid(script):
+    required = ['meta', 'task', 'choices', 'feedback']
+    for field in required:
+        if not hasattr(script, field):
+            error("script does not export '{}' field.".format(field))
+    if any(not hasattr(script, field) for field in required):
+        abort("Script is invalid (see above)")
+
 def parseme():
     parser = argparse.ArgumentParser()
     subparsers = parser.add_subparsers(dest="command")
 
-    parser_new = subparsers.add_parser("new", help="The utility the generate new scripts.")
+    parser_new = subparsers.add_parser(
+        "new", help="The utility the generate new scripts.")
     parser_new.add_argument(
         "name",
-        help="The name of the new script"
+        help="The name of the new script",
+        metavar='NAME'
     )
     parser_new.add_argument(
         "-t",
@@ -58,7 +69,8 @@ def parseme():
         metavar='POINTS',
     )
 
-    parser_gen = subparsers.add_parser("gen", help="Subcommand to convert from script to xml.")
+    parser_gen = subparsers.add_parser(
+        "gen", help="Subcommand to convert from script to xml.")
     parser_gen.add_argument(
         '-o',
         '--out',
@@ -90,6 +102,7 @@ def parseme():
 
 def handle_choice_questions(output, script_name, instances):
     script = importlib.import_module(file_to_module(script_name))
+    script_is_valid(script)
     data = {
         'type': type_selector(script.meta['type']),
         'description': "_description",
@@ -107,6 +120,7 @@ def handle_choice_questions(output, script_name, instances):
     packer.convert_and_print(data, output, instances)
     info('Processed "{}" and wrote xml to "{}".'.format(script_name, output))
 
+
 def handle_new_script(name, type, author, points):
     raise NotImplementedError()
 
diff --git a/hallgrim/IliasXMLCreator/gap.py b/hallgrim/IliasXMLCreator/gap.py
new file mode 100644
index 0000000000000000000000000000000000000000..2c8e83e78093ed8ca67037d0714744dba0898714
--- /dev/null
+++ b/hallgrim/IliasXMLCreator/gap.py
@@ -0,0 +1,15 @@
+import xml.etree.ElementTree as et
+
+from hallgrim.IliasXMLCreator.xmlBuildingBlocks import *
+
+class GapQuestion:
+    """docstring for GapQuestion"""
+    def __init__(self, type, description, question_text, author, title, questions, feedback, gapLength):
+        self.type           = type
+        self.description    = description
+        self.question_text  = question_text
+        self.author         = author
+        self.title          = title
+        self.questions      = questions
+        self.feedback       = feedback
+        self.gapLength      = gapLength
diff --git a/hallgrim/messages.py b/hallgrim/messages.py
index 9f66c17a739612b9d81dc4555b47f1025bc8c488..e698bfd73bb7f51c7daa90b0ed31bd4b88c6add9 100644
--- a/hallgrim/messages.py
+++ b/hallgrim/messages.py
@@ -1,3 +1,5 @@
+import sys
+
 def warn(msg):
     print('[WARN]', msg)
 
@@ -5,4 +7,11 @@ def debug(msg):
     print('[DEBUG]', msg)
 
 def info(msg):
-    print('[INFO]', msg)
\ No newline at end of file
+    print('[INFO]', msg)
+
+def error(msg):
+    print('[ERROR]', msg)
+
+def abort(msg):
+    print('[FATAL]', msg)
+    sys.exit('exiting...')