--- a/core/src/luan/modules/IoLuan.java	Fri May 01 17:18:23 2015 -0600
+++ b/core/src/luan/modules/IoLuan.java	Fri May 01 18:44:20 2015 -0600
@@ -545,8 +545,8 @@
 	}
 
 	public static LuanTable stdin(LuanState luan) throws LuanException {
-		LuanTable io = (LuanTable)PackageLuan.loaded(luan).get("luan:Io");
-		return (LuanTable)io.get("stdin");
+		LuanTable io = (LuanTable)PackageLuan.require(luan,"luan:Io");
+		return (LuanTable)io.get(luan,"stdin");
 	}
 
 	public static LuanTable newSchemes() {
@@ -566,11 +566,11 @@
 		return schemes;
 	}
 
-	private static LuanTable schemes(LuanState luan) {
-		LuanTable t = (LuanTable)PackageLuan.loaded(luan).get("luan:Io");
+	private static LuanTable schemes(LuanState luan) throws LuanException {
+		LuanTable t = (LuanTable)PackageLuan.loaded(luan).rawGet("luan:Io");
 		if( t == null )
 			return newSchemes();
-		t = (LuanTable)t.get("schemes");
+		t = (LuanTable)t.get(luan,"schemes");
 		if( t == null )
 			return newSchemes();
 		return t;
@@ -583,7 +583,7 @@
 		String scheme = name.substring(0,i);
 		String location = name.substring(i+1);
 		LuanTable schemes = schemes(luan);
-		LuanFunction opener = (LuanFunction)schemes.get(scheme);
+		LuanFunction opener = (LuanFunction)schemes.get(luan,scheme);
 		if( opener == null )
 			throw luan.exception( "invalid scheme '"+scheme+"' in '"+name+"'" );
 		return (LuanTable)Luan.first(luan.call(opener,"<open \""+name+"\">",new Object[]{location}));
@@ -618,7 +618,7 @@
 			return new PickleClient(luan,in,out).table();
 		}
 
-		public void run_pickle_server(LuanState luan) throws IOException {
+		public void run_pickle_server(LuanState luan) throws IOException, LuanException {
 			InputStream in = new BufferedInputStream(inputStream());
 			OutputStream out = new BufferedOutputStream(outputStream());
 			new PickleServer(luan,in,out).run();
@@ -679,7 +679,7 @@
 	private static String SECURITY_KEY = "Io.Security";
 
 	private static void check(LuanState luan,String name) throws LuanException {
-		Security s = (Security)luan.registry().get(SECURITY_KEY);
+		Security s = (Security)luan.registry().rawGet(SECURITY_KEY);
 		if( s!=null )
 			s.check(luan,name);
 	}