diff --git a/scripts/main.py b/scripts/main.py
index 5ccf2a3d5508d562a0efbb2100b62ea2f61ba706..dd288b73ddb43661fdd213e2eaa3c4e921f0e559 100644
--- a/scripts/main.py
+++ b/scripts/main.py
@@ -92,7 +92,7 @@ def main(args):
 	
 	if mmio.read(0x10) == 0:
 		print('Fail routing m(_ _)m')
-		return # End function
+		sys.exit(1)
 	
 	W_ext = np.zeros((1,), dtype=np.int16)
 	H_ext = np.zeros((1,), dtype=np.int16)
@@ -106,11 +106,11 @@ def main(args):
 
 	if W_ext[0] > info['W'][0] or H_ext[0] > info['H'][0]:
 		print('Fail satisfying constraint T_T')
-                sys.exit(1)
+		sys.exit(1)
 	else:
 		print('Satisfy constraint ^_^')
 		if args['output'] is not None: mySolverModule.output_to_file(args['output'], W_ext[0], H_ext[0], info['blocks'][0], info['line_num'][0], info['block_info'], result)
-                sys.exit(0)
+		sys.exit(0)
 
 if __name__ == '__main__':