diff --git a/cli.py b/cli.py
index 5fa47a2..305a8a3 100755
--- a/cli.py
+++ b/cli.py
@@ -42,6 +42,8 @@ if len(sys.argv) == 1: # CLI loop
             res = main.get_rstring(main.run_command(commandstr), errorsonly=False)
         except goto:
             res = "Goto is not possible in CLI mode"
+        except RuntimeError as error:
+            res = error.args[0]
         if res != None:
             print(res)
 else:                  # File execution loop
@@ -52,8 +54,10 @@ else:                  # File execution loop
         del sys.argv[1]
         if len(sys.argv[1]) == 1:
             sys.exit(1)
+    scriptfile = sys.argv[1]
+    del sys.argv[0]
     # Save file line-by-line into list
-    with open(sys.argv[1], mode="r") as f:
+    with open(scriptfile, mode="r") as f:
         lines = []
         for line in f:
             if line[-1] == "\n":
@@ -66,6 +70,9 @@ else:                  # File execution loop
         try:
             cmdres = main.get_rstring(main.run_command(lines[linenum]), errorsonly=True)
             linenum += 1
+        except RuntimeError as error:
+            print(f"In line {linenum + 1}:", error.args[0])
+            sys.exit(1)
         except goto as gotoinstr:
             if gotoinstr.define:
                 markers[gotoinstr.marker] = linenum + 1
diff --git a/examples/gettest2.pil b/examples/gettest2.pil
new file mode 100644
index 0000000..7c1bdad
--- /dev/null
+++ b/examples/gettest2.pil
@@ -0,0 +1,34 @@
+#This file is part of pilang.
+#
+#pilang is free software: you can redistribute it and/or modify
+#it under the terms of the GNU General Public License as published by
+#the Free Software Foundation, either version 3 of the License, or
+#(at your option) any later version.
+#
+#pilang is distributed in the hope that it will be useful,
+#but WITHOUT ANY WARRANTY; without even the implied warranty of
+#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#GNU General Public License for more details.
+#
+#You should have received a copy of the GNU General Public License
+#along with pilang.  If not, see <https://www.gnu.org/licenses/>.
+
+catch True
+# Get passed arguments as concenated string
+set argslen,$len $getargv
+set counter,1
+set userin,
+marker set,concatloop
+	append userin,$get "$getargv,$~counter"," "
+	inc counter
+	cmp smaller,$~counter,$~argslen,"marker goto,concatloop"
+
+# Print character for character slowly
+set charnum,0
+marker set,printloop
+	sleep 0.1
+	printnnl $get "$~userin,$~charnum"
+	inc charnum
+	cmp bigger,$len $~userin,$~charnum,"marker goto,printloop"
+
+print
diff --git a/intern.py b/intern.py
index d240b17..56f9b70 100644
--- a/intern.py
+++ b/intern.py
@@ -62,8 +62,7 @@ class main_class:
         finally:
             if environment.catch and iserr:
                 environment.catch = False
-                print("An exception was catched:", self.get_rstring(robj))
-                sys.exit(1)
+                raise RuntimeError(self.get_rstring(robj))
     
     def import_module(self, path):
         with open(path) as file:
@@ -140,4 +139,5 @@ class main_class:
             else:
                 pass
             # Run command
+            #print([command] + [args])
             return module.processor(command, args)
diff --git a/modules/builtin.py b/modules/builtin.py
index a863d5d..d08ac39 100644
--- a/modules/builtin.py
+++ b/modules/builtin.py
@@ -27,11 +27,13 @@ class builtin:
             "len": self.cmd_len,
             "catch": self.cmd_catch,
             "exit": self.cmd_exit,
+            "getargv": self.cmd_getargv,
             "marker": self.cmd_marker,
             "printnnl": self.cmd_printnnl,
             "print": self.cmd_print,
             "input": self.cmd_input,
             "set": self.cmd_set,
+            "append": self.cmd_append,
             "inc": self.cmd_inc,
             "dec": self.cmd_dec,
             "del": self.cmd_del,
@@ -83,6 +85,9 @@ class builtin:
         except IndexError:
             return errors.badarguments
     
+    def cmd_getargv(self, args):
+        return sys.argv
+    
     def cmd_marker(self, args):
         if len(args) != 2:
             return errors.badarguments
@@ -117,6 +122,15 @@ class builtin:
         self.environ.variables[args[0]] = args[1]
         return rtypes.success
     
+    def cmd_append(self, args):
+        if len(args) < 2:
+            return errors.badarguments
+        if not str(args[0]) in self.environ.variables:
+            return errors.nosuchvariable
+        for arg in args[1:]:
+            self.environ.variables[str(args[0])] += str(arg)
+        return rtypes.success
+    
     def cmd_inc(self, args):
         if len(args) == 1:
             args.append(1)
@@ -125,7 +139,7 @@ class builtin:
         try:
             self.environ.variables[args[0]] = str(float(self.environ.variables[args[0]]) + float(args[1]))
         except KeyError:
-            return errors.badarguments
+            return errors.nosuchvariable
         return rtypes.success
     
     def cmd_dec(self, args):