diff --git a/interpreter.c b/interpreter.c
old mode 100755
new mode 100644
index 82279b8..5d216ce
--- a/interpreter.c
+++ b/interpreter.c
@@ -28,7 +28,7 @@ static void (*bfi_lexer_init)(void);
 static char bfi_memory[NB_MEMORY_WORDS];
 
 /* Reading/Writing Head, which points to a memory word */
-static char *bfi_head;				
+static char *bfi_head;
 
 /**************************************************************************
  *                            PRIVATE INTERFACE                           *
@@ -41,13 +41,13 @@ static int bfi_execution_error(char* reason, int code)
 {
 	int i;
 	printf( COLOR_RST "\n" COLOR_ERR "%s" COLOR_MSG "\n", reason);
-	
+
 	printf( COLOR_RST "At position : %s" COLOR_MSG "\n", (bfi_program + bfi_token_start));
-	
+
 	for(i = 0; i < MEMORY_DUMP_SIZE; i++)
 		printf("%s%02x", i%4==0? (i%16==0?"\n": "::"): " ", bfi_memory[i]);
 	printf(COLOR_RST "\n");
-	
+
 	return code;
 }
 
@@ -56,7 +56,7 @@ static int bfi_execution_error(char* reason, int code)
  * to be executed.
  * Hypotheses: bfi_token_start points just after the opening bracket.
  */
-static int bfi_skip_forward(void)
+static void bfi_skip_forward(void)
 {
 	int context = 0;
 	int next = -1;
@@ -70,17 +70,15 @@ static int bfi_skip_forward(void)
 			/* Closing bracket */
 			case JNB: context--;
 				if(context == 0)
-					return next;
+					return;
 				break;
 			/* End of the program or unknown instruction. */
 			case EOT:
 			case SOT:
 			case UKW:
-				return next;
+				return;
 		}
 	}
-	
-	return next;
 }
 
 /**
@@ -88,18 +86,18 @@ static int bfi_skip_forward(void)
  * to be executed.
  * Hypotheses: bfi_token_start points just before the closing bracket.
  */
-int bfi_skip_backward(void)
+static void bfi_skip_backward(void)
 {
 	int context = 0;
 	int prev = -1;
-	
+
 	while((prev = bfi_read_previous_token(bfi_program, &bfi_token_start, bfi_length)) != SOT)
 	{
 		switch(prev)
 		{ /* Opening bracket */
 			case JZF: context--; 
 				if(context == 0)
-					return prev;
+					return;
 				break;
 			/* Closing bracket */
 			case JNB: context++; 
@@ -108,11 +106,9 @@ int bfi_skip_backward(void)
 			case EOT:
 			case SOT:
 			case UKW:
-				return prev;
+				return;
 		}
 	}
-	
-	return prev;
 }
 
 /**
@@ -124,13 +120,13 @@ int bfi_skip_backward(void)
 static int bfi_initialize(enum bfi_dialects dialect)
 {
 	int i;
-	
+
 	/* Reset memory state. */
 	for(i = 0; i < NB_MEMORY_WORDS; i++)
 		bfi_memory[i] = 0;
-	
+
 	bfi_head = bfi_memory;
-	
+
 	/* Initialize the parser functions. */
 	switch(dialect)
 	{
@@ -144,7 +140,7 @@ static int bfi_initialize(enum bfi_dialects dialect)
 			bfi_lexer_init = heu_lexer_init;
 			bfi_read_previous_token = heu_read_previous_token;
 			bfi_read_next_token = heu_read_next_token;
-			
+
 			break;
 		default:
 			return -1;
@@ -164,7 +160,7 @@ int bfi_execute(char* program, size_t length, enum bfi_dialects dialect, char pr
 	int next = EOT;
 	bfi_program = program;
 	bfi_length = length;
-	
+
 	if(bfi_initialize(dialect) != 0)
 		return -UNKNOWN_DIALECT;
 
@@ -174,13 +170,13 @@ int bfi_execute(char* program, size_t length, enum bfi_dialects dialect, char pr
 		{
 			case MVL:
 				--bfi_head;
-				
+
 				if(bfi_head < bfi_memory)
 					return bfi_execution_error("HEAD Got past the start of memory!", -INVALID_MEMORY_ADDRESS);
 				break;
 			case MVR:
 				++bfi_head;
-				
+
 				if(bfi_head >= bfi_memory + NB_MEMORY_WORDS)
 					return bfi_execution_error("HEAD Got past the end of memory!", -INVALID_MEMORY_ADDRESS);
 				break;
@@ -201,21 +197,23 @@ int bfi_execute(char* program, size_t length, enum bfi_dialects dialect, char pr
 				break;
 			case JZF:
 				if(*bfi_head == 0)
-					next = bfi_skip_forward();
+					bfi_skip_forward();
 				break;
 			case JNB:
 				if(*bfi_head != 0)
-					next = bfi_skip_backward();
+					bfi_skip_backward();
 				break;
 			case UKW:
 			default:
 				return bfi_execution_error("Unknown keyword !", -INVALID_OPERATION);
 		}
 	}
-	
+
 	bfi_execution_error("End of Program", *bfi_head);
+
 	/* Ensure there is an end of line */
 	printf("\n");
+
 	return (int)*bfi_head;
 }
 
diff --git a/main.c b/main.c
old mode 100755
new mode 100644
index 4ee485e..4bb84b3
--- a/main.c
+++ b/main.c
@@ -171,7 +171,7 @@ int main(int argc, const char *argv[])
 	{
 		perror("init");
 		printf(COLOR_ERR "Error during the loading of '%s'." COLOR_RST "\n", options.filename);
-		return 1;
+		return err;
 	}
 	
 	/* Print the program as loaded into memory. */