diff --git a/stix/lib/comp.c b/stix/lib/comp.c
index 6f0aeb1..6fc1997 100644
--- a/stix/lib/comp.c
+++ b/stix/lib/comp.c
@@ -394,6 +394,7 @@ static STIX_INLINE void unget_char (stix_t* stix, const stix_iolxc_t* c)
 static int get_char (stix_t* stix)
 {
 	stix_ssize_t n;
+	stix_uci_t lc, ec;
 
 	if (stix->c->nungots > 0)
 	{
@@ -402,13 +403,25 @@ static int get_char (stix_t* stix)
 		return 0;
 	}
 
+	if (stix->c->curinp->b.state == -1) 
+	{
+		stix->c->curinp->b.state = 0;
+		return -1;
+	}
+	else if (stix->c->curinp->b.state == 1) 
+	{
+		stix->c->curinp->b.state = 0;
+		goto return_eof;
+	}
+
 	if (stix->c->curinp->b.pos >= stix->c->curinp->b.len)
 	{
 		n = stix->c->impl (stix, STIX_IO_READ, stix->c->curinp);
 		if (n <= -1) return -1;
-
+		
 		if (n == 0)
 		{
+		return_eof:
 			stix->c->curinp->lxc.c = STIX_UCI_EOF;
 			stix->c->curinp->lxc.l.line = stix->c->curinp->line;
 			stix->c->curinp->lxc.l.colm = stix->c->curinp->colm;
@@ -434,7 +447,43 @@ static int get_char (stix_t* stix)
 		stix->c->curinp->colm = 1;
 	}
 
-	stix->c->curinp->lxc.c = stix->c->curinp->buf[stix->c->curinp->b.pos++];
+	lc = stix->c->curinp->buf[stix->c->curinp->b.pos++];
+	if (lc == '\n' || lc == '\r')
+	{
+		/* handle common newline conventions.
+		 *   LF+CR
+		 *   CR+LF
+		 *   LF
+		 *   CR
+		 */
+		if (stix->c->curinp->b.pos >= stix->c->curinp->b.len)
+		{
+			n = stix->c->impl (stix, STIX_IO_READ, stix->c->curinp);
+			if (n <= -1) 
+			{
+				stix->c->curinp->b.state = -1;
+				goto done;
+			}
+			else if (n == 0)
+			{
+				stix->c->curinp->b.state = 1;
+				goto done;
+			}
+			else
+			{
+				stix->c->curinp->b.pos = 0;
+				stix->c->curinp->b.len = n;
+			}
+		}
+
+		ec = (lc == '\n')? '\r': '\n';
+		if (stix->c->curinp->buf[stix->c->curinp->b.pos] == ec) stix->c->curinp->b.pos++;
+
+	done:
+		lc = STIX_UCI_NL;
+	}
+
+	stix->c->curinp->lxc.c = lc;
 	stix->c->curinp->lxc.l.line = stix->c->curinp->line;
 	stix->c->curinp->lxc.l.colm = stix->c->curinp->colm++;
 	stix->c->curinp->lxc.l.file = stix->c->curinp->name;
@@ -957,7 +1006,7 @@ static int begin_include (stix_t* stix)
 	{
 		end_include (stix); 
 		/* i don't jump to oops since i've called 
-		 * end_include() where stix->c->curinp/arg is freed. */
+		 * end_include() which frees stix->c->curinp/arg */
 		return -1;
 	}
 
@@ -1686,6 +1735,7 @@ static int compile_method_primitive (stix_t* stix)
 static int get_variable_info (stix_t* stix, const stix_ucs_t* name, const stix_ioloc_t* name_loc, var_info_t* var)
 {
 	stix_ssize_t index;
+
 	STIX_MEMSET (var, 0, STIX_SIZEOF(*var));
 
 	index = find_temporary_variable (stix, name);
@@ -1754,7 +1804,7 @@ static int get_variable_info (stix_t* stix, const stix_ucs_t* name, const stix_i
 		}
 	}
 
-	if (index > MAX_CODE_INDEX)
+	if (var->pos > MAX_CODE_INDEX)
 	{
 		/* the assignee is not usable because its index is too large 
 		 * to be expressed in byte-codes. */
@@ -3102,8 +3152,12 @@ int stix_compile (stix_t* stix, stix_ioimpl_t io)
 	}
 
 	stix->c->impl = io;
+
+	STIX_MEMSET (&stix->c->arg, 0, STIX_SIZEOF(stix->c->arg));
 	stix->c->arg.line = 1;
 	stix->c->arg.colm = 1;
+	stix->c->nungots = 0;
+
 	stix->c->curinp = &stix->c->arg;
 	clear_io_names (stix);
 
diff --git a/stix/lib/debug.c b/stix/lib/debug.c
new file mode 100644
index 0000000..f86fa0e
--- /dev/null
+++ b/stix/lib/debug.c
@@ -0,0 +1,99 @@
+/*
+ * $Id$
+ *
+    Copyright (c) 2014-2015 Chung, Hyung-Hwan. All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
+    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAfRRANTIES
+    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "stix-prv.h"
+
+void dump_symbol_table (stix_t* stix)
+{
+	stix_oow_t i, j;
+	stix_oop_char_t symbol;
+
+	printf ("--------------------------------------------\n");
+	printf ("Stix Symbol Table %lu\n", (unsigned long int)STIX_OBJ_GET_SIZE(stix->symtab->bucket));
+	printf ("--------------------------------------------\n");
+
+	for (i = 0; i < STIX_OBJ_GET_SIZE(stix->symtab->bucket); i++)
+	{
+		symbol = (stix_oop_char_t)stix->symtab->bucket->slot[i];
+		if ((stix_oop_t)symbol != stix->_nil)
+		{
+			printf (" %lu [", (unsigned long int)i);
+			for (j = 0; j < STIX_OBJ_GET_SIZE(symbol); j++)
+			{
+				printf ("%c", symbol->slot[j]);
+			}
+			printf ("]\n");
+		}
+	}
+	printf ("--------------------------------------------\n");
+}
+
+void dump_dictionary (stix_t* stix, stix_oop_set_t dic, const char* title)
+{
+	stix_oow_t i, j;
+	stix_oop_association_t ass;
+
+	printf ("--------------------------------------------\n");
+	printf ("%s %lu\n", title, (unsigned long int)STIX_OBJ_GET_SIZE(dic->bucket));
+	printf ("--------------------------------------------\n");
+
+	for (i = 0; i < STIX_OBJ_GET_SIZE(dic->bucket); i++)
+	{
+		ass = (stix_oop_association_t)dic->bucket->slot[i];
+		if ((stix_oop_t)ass != stix->_nil)
+		{
+			printf (" %lu [", (unsigned long int)i);
+			for (j = 0; j < STIX_OBJ_GET_SIZE(ass->key); j++)
+			{
+				printf ("%c", ((stix_oop_char_t)ass->key)->slot[j]);
+			}
+			printf ("]\n");
+		}
+	}
+	printf ("--------------------------------------------\n");
+}
+
+void print_ucs (const stix_ucs_t* name)
+{
+	stix_size_t i;
+	for (i = 0; i < name->len; i++) printf ("%c", name->ptr[i]);
+}
+
+
+void dump_object (stix_t* stix, stix_oop_t oop, const char* title)
+{
+	stix_oop_class_t c;
+	stix_ucs_t s;
+
+	printf ("%s: ", title);
+	printf ("%p instance of ", oop);
+
+	c = (stix_oop_class_t)STIX_CLASSOF(stix, oop);
+	s.ptr = ((stix_oop_char_t)c->name)->slot;
+	s.len = STIX_OBJ_GET_SIZE(c->name);
+	print_ucs (&s);
+	printf ("\n");
+}
diff --git a/stix/lib/exec.c b/stix/lib/exec.c
index 7e07af7..905dab3 100644
--- a/stix/lib/exec.c
+++ b/stix/lib/exec.c
@@ -274,20 +274,6 @@ TODO: overcome this problem
 		(stix)->active_context->slot[sp] = v; \
 	} while (0)
 
-static void dump_object (stix_t* stix, stix_oop_t oop, const char* title)
-{
-	stix_oop_class_t c;
-	stix_ucs_t s;
-
-	printf ("%s: ", title);
-	printf ("%p instance of ", oop);
-
-	c = STIX_CLASSOF(stix, oop);
-	s.ptr = ((stix_oop_char_t)c->name)->slot;
-	s.len = STIX_OBJ_GET_SIZE(c->name);
-	print_ucs (&s);
-	printf ("\n");
-}
 static int execute_primitive (stix_t* stix, int prim_no, stix_ooi_t nargs, stix_ooi_t* xsp)
 {
 	/* a primitive handler must pop off all arguments and the receiver and
diff --git a/stix/lib/main.c b/stix/lib/main.c
index 5697040..06c9206 100644
--- a/stix/lib/main.c
+++ b/stix/lib/main.c
@@ -157,61 +157,6 @@ static stix_ssize_t input_handler (stix_t* stix, stix_iocmd_t cmd, stix_ioarg_t*
 	}
 }
 
-static void dump_symbol_table (stix_t* stix)
-{
-	stix_oow_t i, j;
-	stix_oop_char_t symbol;
-
-	printf ("--------------------------------------------\n");
-	printf ("Stix Symbol Table %lu\n", (unsigned long int)STIX_OBJ_GET_SIZE(stix->symtab->bucket));
-	printf ("--------------------------------------------\n");
-
-	for (i = 0; i < STIX_OBJ_GET_SIZE(stix->symtab->bucket); i++)
-	{
-		symbol = (stix_oop_char_t)stix->symtab->bucket->slot[i];
-		if ((stix_oop_t)symbol != stix->_nil)
-		{
-			printf (" %lu [", (unsigned long int)i);
-			for (j = 0; j < STIX_OBJ_GET_SIZE(symbol); j++)
-			{
-				printf ("%c", symbol->slot[j]);
-			}
-			printf ("]\n");
-		}
-	}
-	printf ("--------------------------------------------\n");
-}
-
-void dump_dictionary (stix_t* stix, stix_oop_set_t dic, const char* title)
-{
-	stix_oow_t i, j;
-	stix_oop_association_t ass;
-
-	printf ("--------------------------------------------\n");
-	printf ("%s %lu\n", title, (unsigned long int)STIX_OBJ_GET_SIZE(dic->bucket));
-	printf ("--------------------------------------------\n");
-
-	for (i = 0; i < STIX_OBJ_GET_SIZE(dic->bucket); i++)
-	{
-		ass = (stix_oop_association_t)dic->bucket->slot[i];
-		if ((stix_oop_t)ass != stix->_nil)
-		{
-			printf (" %lu [", (unsigned long int)i);
-			for (j = 0; j < STIX_OBJ_GET_SIZE(ass->key); j++)
-			{
-				printf ("%c", ((stix_oop_char_t)ass->key)->slot[j]);
-			}
-			printf ("]\n");
-		}
-	}
-	printf ("--------------------------------------------\n");
-}
-
-void print_ucs (const stix_ucs_t* name)
-{
-	stix_size_t i;
-	for (i = 0; i < name->len; i++) printf ("%c", name->ptr[i]);
-}
 static char* syntax_error_msg[] = 
 {
 	"no error",
@@ -262,6 +207,7 @@ int main (int argc, char* argv[])
 	xtn_t* xtn;
 	stix_ucs_t objname;
 	stix_ucs_t mthname;
+	int i;
 
 	printf ("Stix 1.0.0 - max named %lu max indexed %lu max class %lu max classinst %lu\n", 
 		(unsigned long int)STIX_MAX_NAMED_INSTVARS, 
@@ -282,9 +228,9 @@ printf ("%ld\n", (long int)STIX_OOP_TO_SMINT(k));
 }
 
 #if !defined(macintosh)
-	if (argc != 2)
+	if (argc < 2)
 	{
-		fprintf (stderr, "Usage: %s filename\n", argv[0]);
+		fprintf (stderr, "Usage: %s filename ...\n", argv[0]);
 		return -1;
 	}
 #endif
@@ -354,58 +300,66 @@ printf ("%p\n", a);
 }
 
 	xtn = stix_getxtn (stix);
-#if !defined(macintosh)
-	xtn->source_path = argv[1];
-#else
+
+#if defined(macintosh)
+	i = 20;
 	xtn->source_path = "test.st";
+	goto compile;
 #endif
-	if (stix_compile (stix, input_handler) <= -1)
+
+	for (i = 1; i < argc; i++)
 	{
-		if (stix->errnum == STIX_ESYNTAX)
+		xtn->source_path = argv[i];
+
+	compile:
+
+		if (stix_compile (stix, input_handler) <= -1)
 		{
-			stix_synerr_t synerr;
-			stix_bch_t bcs[1024]; /* TODO: right buffer size */
-			stix_size_t bcslen, ucslen;
-
-			stix_getsynerr (stix, &synerr);
-
-			printf ("ERROR: ");
-			if (synerr.loc.file)
+			if (stix->errnum == STIX_ESYNTAX)
 			{
-				bcslen = STIX_COUNTOF(bcs);
-				ucslen = ~(stix_size_t)0;
-				if (stix_ucstoutf8 (synerr.loc.file, &ucslen, bcs, &bcslen) >= 0)
+				stix_synerr_t synerr;
+				stix_bch_t bcs[1024]; /* TODO: right buffer size */
+				stix_size_t bcslen, ucslen;
+
+				stix_getsynerr (stix, &synerr);
+
+				printf ("ERROR: ");
+				if (synerr.loc.file)
 				{
-					printf ("%.*s ", (int)bcslen, bcs);
-				}
-			}
-
-
-			printf ("syntax error at line %lu column %lu - %s", 
-				(unsigned long int)synerr.loc.line, (unsigned long int)synerr.loc.colm,
-				syntax_error_msg[synerr.num]);
-			if (synerr.tgt.len > 0)
-			{
-				bcslen = STIX_COUNTOF(bcs);
-				ucslen = synerr.tgt.len;
-
-				if (stix_ucstoutf8 (synerr.tgt.ptr, &ucslen, bcs, &bcslen) >= 0)
-				{
-					printf (" [%.*s]", (int)bcslen, bcs);
+					bcslen = STIX_COUNTOF(bcs);
+					ucslen = ~(stix_size_t)0;
+					if (stix_ucstoutf8 (synerr.loc.file, &ucslen, bcs, &bcslen) >= 0)
+					{
+						printf ("%.*s ", (int)bcslen, bcs);
+					}
 				}
 
+
+				printf ("syntax error at line %lu column %lu - %s", 
+					(unsigned long int)synerr.loc.line, (unsigned long int)synerr.loc.colm,
+					syntax_error_msg[synerr.num]);
+				if (synerr.tgt.len > 0)
+				{
+					bcslen = STIX_COUNTOF(bcs);
+					ucslen = synerr.tgt.len;
+
+					if (stix_ucstoutf8 (synerr.tgt.ptr, &ucslen, bcs, &bcslen) >= 0)
+					{
+						printf (" [%.*s]", (int)bcslen, bcs);
+					}
+
+				}
+				printf ("\n");
 			}
-			printf ("\n");
+			else
+			{
+				printf ("ERROR: cannot compile code - %d\n", stix_geterrnum(stix));
+			}
+			stix_close (stix);
+			return -1;
 		}
-		else
-		{
-			printf ("ERROR: cannot compile code - %d\n", stix_geterrnum(stix));
-		}
-		stix_close (stix);
-		return -1;
 	}
 
-
 /*	objname.ptr = str_stix;
 	objname.len = 4;*/
 	objname.ptr = str_my_object;
diff --git a/stix/lib/stix-prv.h b/stix/lib/stix-prv.h
index af791ff..cf8bc70 100644
--- a/stix/lib/stix-prv.h
+++ b/stix/lib/stix-prv.h
@@ -165,11 +165,12 @@ struct stix_iolxc_t
 };
 typedef struct stix_iolxc_t stix_iolxc_t;
 
+/*
 enum stix_ioarg_flag_t
 {
 	STIX_IO_INCLUDED = (1 << 0)
 };
-typedef enum stix_ioarg_flag_t stix_ioarg_flag_t;
+typedef enum stix_ioarg_flag_t stix_ioarg_flag_t; */
 
 typedef struct stix_ioarg_t stix_ioarg_t;
 struct stix_ioarg_t
@@ -204,7 +205,7 @@ struct stix_ioarg_t
 	/*----------- from here down, internal use only -------------------*/
 	struct
 	{
-		int pos, len;
+		int pos, len, state;
 	} b;
 
 	unsigned long line;
@@ -317,9 +318,6 @@ struct stix_synerr_t
 typedef struct stix_synerr_t stix_synerr_t;
 
 
-typedef enum stix_code_id_t stix_code_id_t;
-
-
 struct stix_code_t
 {
 	stix_uint8_t* ptr;
@@ -739,6 +737,16 @@ void stix_getsynerr (
 	stix_synerr_t* synerr
 );
 
+
+/* TODO: remove debugging functions */
+/* ========================================================================= */
+/* debug.c                                                                   */
+/* ========================================================================= */
+void dump_symbol_table (stix_t* stix);
+void dump_dictionary (stix_t* stix, stix_oop_set_t dic, const char* title);
+void print_ucs (const stix_ucs_t* name);
+void dump_object (stix_t* stix, stix_oop_t oop, const char* title);
+
 #if defined(__cplusplus)
 }
 #endif
diff --git a/stix/lib/stix.h b/stix/lib/stix.h
index 1f45d8f..b76a0ec 100644
--- a/stix/lib/stix.h
+++ b/stix/lib/stix.h
@@ -72,7 +72,6 @@ typedef struct stix_ucs_t stix_ucs_t;
 #define STIX_UCI_EOF ((stix_uci_t)-1)
 #define STIX_UCI_NL  ((stix_uci_t)'\n')
 
-
 #define STIX_SIZEOF(x) (sizeof(x))
 #define STIX_COUNTOF(x) (sizeof(x) / sizeof(x[0]))