diff --git a/src/cligen/command.cr b/src/cligen/command.cr
index d62f630..bc2b071 100644
--- a/src/cligen/command.cr
+++ b/src/cligen/command.cr
@@ -28,6 +28,10 @@ module CliGen
                 @{{var.id}} = {{var.default_value}}
               {% end %}
             {% end %}
+
+            {% if @type.has_method? :after_initialize %}
+              after_initialize
+            {% end %}
           {% end %}
         end
       end
diff --git a/src/cligen/command_node.cr b/src/cligen/command_node.cr
index 3947075..77492cb 100644
--- a/src/cligen/command_node.cr
+++ b/src/cligen/command_node.cr
@@ -235,7 +235,7 @@ module CliGen
           end
 
         when MatchType::NoMatch
-          raise "ERROR : CommandNode(#{@name}).process : No command, subcommand or flag match for '#{arg.value}'"
+          abort "ERROR : CommandNode(#{@name}).process : No command, subcommand or flag match for '#{arg.value}'"
         end
       end
 
@@ -255,7 +255,8 @@ module CliGen
           {% if T.has_method?(:main) %}
             cls.main
           {% else %}
-            raise "ERROR : CommandNode({{T}})\#{{@def.name}} : No subcommand matched and no #main defined"
+            abort help
+            #raise "ERROR : CommandNode({{T}})\#{{@def.name}} : No subcommand matched and no #main defined"
           {% end %}
         end
         {% end %}
diff --git a/src/cligen/flag.cr b/src/cligen/flag.cr
index 6710198..06749a2 100644
--- a/src/cligen/flag.cr
+++ b/src/cligen/flag.cr
@@ -61,12 +61,10 @@ module CliGen
 
     def process(argv : Array(Arg) = [] of Arg) : Nil
       if requires_arg?
-        raise "ERROR : Flag({{T}}) : Array requires an argument but provided array is empty" if argv.empty?
+        raise "ERROR : Flag(#{T}, long: #{@long_key}) : Array requires an argument but provided array is empty" if argv.empty?
+        abort "ERROR : Flag(#{T}, long: #{@long_key}) : Provided argument was a flag (#{argv.first.value})" if argv.first.flag?
       end
 
-      if argv.first.flag?
-        abort "ERROR : Flag({{T}}) : Provided argument was a flag (#{argv.first.value})"
-      end
 
       {% if T == Bool %}
         @value = true
@@ -101,7 +99,7 @@ module CliGen
       {% elsif T == String %} # String
         @value = argv.first.value
         argv.first.processed
-      {% elsif T.class < CliGen::Parseable %}
+      {% elsif T.class < CliGen::Parsable %}
         processed = argv.select(&.processed?)
         @value = T.parse_args(argv)
         post_processed = argv.select(&.processed?)
@@ -109,7 +107,7 @@ module CliGen
           raise "ERROR : Flag({{T}}, long: #{@long_key})#process : Your {{T}}#process_args did not mark processed args as processed. Please check your code"
         end
       {% else %}
-        {% raise "ERROR : Flag({{T}}#process : Generic Type #{T} is not supported. To add support you must include CliGen::Parsable & implement the class method" %}
+        {% raise "ERROR : Flag({{T}}#process : Generic Type #{T} is not supported. To add support you must extend with CliGen::Parsable & implement the class method" %}
       {% end %}
 
       validate!
diff --git a/src/cligen/parsable.cr b/src/cligen/parsable.cr
index 533bd7d..7c5a9d0 100644
--- a/src/cligen/parsable.cr
+++ b/src/cligen/parsable.cr
@@ -1,3 +1,3 @@
-module CliGen::Parseable
+module CliGen::Parsable
   abstract def parse_args(args : Array(CliGen::Arg)) 
 end