--- rpl/src/analyse.c	2010/07/02 08:40:27	1.21
+++ rpl/src/analyse.c	2010/07/14 14:19:32	1.23
@@ -1,6 +1,6 @@
 /*
 ================================================================================
-  RPL/2 (R) version 4.0.17
+  RPL/2 (R) version 4.0.18
   Copyright (C) 1989-2010 Dr. BERTRAND Joël
 
   This file is part of RPL/2.
@@ -834,6 +834,7 @@ initialisation_instructions(struct_proce
 
 	INSTRUCTION("AUTOSCALE", instruction_autoscale);
 	INSTRUCTION("BACKSPACE", instruction_backspace);
+	INSTRUCTION("BACKTRACE", instruction_backtrace);
 	INSTRUCTION("CLRATEXIT", instruction_clratexit);
 	INSTRUCTION("COPYRIGHT", instruction_copyright);
 	//INSTRUCTION("CYLINDRIC");