diff --git a/share/man/nit.md b/share/man/nit.md
index 7d30a09f0f..d210fcf540 100644
--- a/share/man/nit.md
+++ b/share/man/nit.md
@@ -86,6 +86,11 @@ Each time a method is invoked for the first time, its information is printed on
 
 This option helps the user to have a simplified but humanly readable overview of the behavior of a particular program execution.
 
+### `--break`
+Start the program to indicate the breakpoints for the interpretation.
+
+Print the menu to add or remove some breakpoint
+
 ## DEBUGGER OPTIONS
 
 ### `-d`
diff --git a/src/interpreter/naive_interpreter.nit b/src/interpreter/naive_interpreter.nit
index 7cdceb480f..90bfb3cea7 100644
--- a/src/interpreter/naive_interpreter.nit
+++ b/src/interpreter/naive_interpreter.nit
@@ -27,11 +27,14 @@ private import frontend::explain_assert_api
 redef class ToolContext
 	# --discover-call-trace
 	var opt_discover_call_trace = new OptionBool("Trace calls of the first invocation of methods", "--discover-call-trace")
+	# --stop-at
+	var opt_stop = new OptionBool("Start the program to indicate the breakpoints for the interpretation","--break")
 
 	redef init
 	do
 		super
 		self.option_context.add_option(self.opt_discover_call_trace)
+		self.option_context.add_option(self.opt_stop)
 	end
 end
 
diff --git a/src/interpreter/step_interpreter.nit b/src/interpreter/step_interpreter.nit
index 544db1ffb8..faad462dcb 100644
--- a/src/interpreter/step_interpreter.nit
+++ b/src/interpreter/step_interpreter.nit
@@ -36,8 +36,19 @@ redef class NaiveInterpreter
 	# This flag is used to launch setp by step interpreter
 	var debug_flag = false
 
+	# The breakpoint tool
+	private var breakpoint : Breakpoints
+
 	private var user_entry = ""
 
+	init do
+		super
+		breakpoint = new Breakpoints(self.modelbuilder)
+		if modelbuilder.toolcontext.opt_stop.value then
+			breakpoint.define_breakpoints
+		end
+	end
+
 	# Print the commands to execute step-by-step execution
 	fun print_instruction_debug do
 		print "────────────────────────────────────────────────────────────────────"
@@ -85,6 +96,10 @@ redef class NaiveInterpreter
 
 	# Main function of the step-by-step execution this method is called after each instruction
 	fun step_execution(recv : nullable Instance) do
+		if frame isa InterpreterFrame and breakpoint.is_breakpoint(frame.current_node.location) then
+			self.deep_old_frame = frames.length
+			self.debug_flag = true
+		end
 		if self.debug_flag then
 			init_debug_mode
 			if recv != null then
@@ -102,6 +117,9 @@ redef class NaiveInterpreter
 				self.object_inspector.print_pin_list_value
 				self.user_entry = stdin.read_line
 				self.step_execution(recv)
+			else if user_entry == "break" then
+				self.user_entry = ""
+				self.breakpoint.define_breakpoints
 			else if user_entry == "continue" then
 				self.user_entry = ""
 				self.debug_flag = false
@@ -142,6 +160,101 @@ redef class NaiveInterpreter
 		super
 	end
 end
+
+class Breakpoints
+
+	# The map representing the breakpoints with the links of the source file and array of lines
+	private var breakpoints_list = new ArrayMap[SourceFile,Array[Int]]
+
+	# The modelbuilder is stored to check the module
+	var modelbuilder: ModelBuilder
+
+	redef fun to_s do
+		var return_list = ""
+		for file, lines in breakpoints_list do
+			return_list += "File : {file.filename} lines : {lines} \n"
+		end
+		return return_list
+	end
+
+	# Is there location is a breakpoint?
+	fun is_breakpoint(location : Location): Bool do
+		if breakpoints_list.has_key(location.file) then
+			return breakpoints_list[location.file].has(location.line_start)
+		end
+		return false
+	end
+
+	# Method to interact with the breakpoints list
+	fun define_breakpoints do
+		print "────────────────────────────────────────────────────────────────────"
+		print "Breakpoints list"
+		print "{self.to_s}"
+		print "For add enter" + " 'break [file name] [line number,...]'".yellow + " for remove " + "'clear [file name] [line number,...]'".yellow
+		print "To leave the breakpoint mode enter " + "leave".yellow
+		print "────────────────────────────────────────────────────────────────────"
+		var user_entry = stdin.read_line.split(" ")
+		if user_entry.length%3 == 0 then
+			for x in [0 .. user_entry.length[.step(3) do
+				var action = user_entry[x]
+				var file = check_file(user_entry[x+1])
+				var lines = check_line(user_entry[x+2])
+				if file != null then
+					if action == "break" then
+						add_breakpoints(file,lines)
+					else if action == "clear" then
+						remove_breakpoint(file,lines)
+					else
+						print "Command unknown"
+					end
+				end
+			end
+		else
+			print "Error on the number of parameters"
+		end
+	end
+
+	# Check in the list of modules the source file exists with the name of the parameter.
+	# If it exists, return this.
+	fun check_file(name: String) : nullable SourceFile do
+		for mmodule in modelbuilder.identified_modules do
+			if mmodule.location.file.filename.search(name) != null then return mmodule.location.file
+		end
+		print "File not found"
+		return null
+	end
+
+	# Check the user input line.
+	fun check_line(string_line: String) : Array[Int] do
+		var lines = string_line.split(",")
+		var return_array = new Array[Int]
+		for line in lines do
+			if line.is_int then
+				return_array.add(line.to_i)
+			end
+		end
+		return return_array
+	end
+
+	fun add_breakpoints(file : SourceFile,lines : Array[Int])do
+		if not lines.is_empty then
+			if breakpoints_list.has_key(file) then
+				breakpoints_list[file].add_all(lines)
+			else
+				breakpoints_list[file] = lines
+			end
+		end
+	end
+
+	fun remove_breakpoint(file : SourceFile,lines : Array[Int])do
+		if not lines.is_empty then
+			for line in lines do
+				breakpoints_list[file].remove_all(line)
+			end
+		end
+	end
+end
+
 # Represents the inspected object with the relationship between the instance and the name of the object (if it exists)
 class ObjectInspected
 	# The instance of the inspected object.
diff --git a/tests/sav/error_class_glob.res b/tests/sav/error_class_glob.res
index 46e2b1aed4..504e245e89 100644
--- a/tests/sav/error_class_glob.res
+++ b/tests/sav/error_class_glob.res
@@ -1,13 +1,13 @@
-../lib/core/kernel.nit:32,1--225,3: Error: `kernel$Object` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:227,1--300,3: Error: `kernel$Sys` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:313,1--371,3: Error: `kernel$Comparable` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:373,1--410,3: Error: `kernel$Discrete` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:412,1--429,3: Error: `kernel$Cloneable` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:431,1--486,3: Error: `kernel$Numeric` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:492,1--515,3: Error: `kernel$Bool` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:517,1--599,3: Error: `kernel$Float` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:601,1--700,3: Error: `kernel$Byte` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:702,1--883,3: Error: `kernel$Int` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:885,1--1064,3: Error: `kernel$Char` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:1066,1--1083,3: Error: `kernel$Pointer` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
-../lib/core/kernel.nit:1085,1--1094,3: Error: `kernel$Task` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:32,1--230,3: Error: `kernel$Object` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:232,1--305,3: Error: `kernel$Sys` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:318,1--376,3: Error: `kernel$Comparable` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:378,1--415,3: Error: `kernel$Discrete` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:417,1--434,3: Error: `kernel$Cloneable` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:436,1--491,3: Error: `kernel$Numeric` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:497,1--520,3: Error: `kernel$Bool` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:522,1--604,3: Error: `kernel$Float` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:606,1--705,3: Error: `kernel$Byte` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:707,1--888,3: Error: `kernel$Int` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:890,1--1069,3: Error: `kernel$Char` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:1071,1--1088,3: Error: `kernel$Pointer` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
+../lib/core/kernel.nit:1090,1--1099,3: Error: `kernel$Task` does not specialize `module_0$Object`. Possible duplication of the root class `Object`?
diff --git a/tests/sav/nitce/fixme/base_gen_reassign_alt4.res b/tests/sav/nitce/fixme/base_gen_reassign_alt4.res
index 5bdd4bf614..e131b2ec7a 100644
--- a/tests/sav/nitce/fixme/base_gen_reassign_alt4.res
+++ b/tests/sav/nitce/fixme/base_gen_reassign_alt4.res
@@ -1,4 +1,4 @@
-Runtime error: Cast failed. Expected `OTHER`, got `Float` (../lib/core/kernel.nit:723)
+Runtime error: Cast failed. Expected `OTHER`, got `Float` (../lib/core/kernel.nit:728)
 11
 21
 31
diff --git a/tests/sav/nitce/fixme/base_gen_reassign_alt5.res b/tests/sav/nitce/fixme/base_gen_reassign_alt5.res
index 5bdd4bf614..e131b2ec7a 100644
--- a/tests/sav/nitce/fixme/base_gen_reassign_alt5.res
+++ b/tests/sav/nitce/fixme/base_gen_reassign_alt5.res
@@ -1,4 +1,4 @@
-Runtime error: Cast failed. Expected `OTHER`, got `Float` (../lib/core/kernel.nit:723)
+Runtime error: Cast failed. Expected `OTHER`, got `Float` (../lib/core/kernel.nit:728)
 11
 21
 31
diff --git a/tests/sav/nitce/fixme/base_gen_reassign_alt6.res b/tests/sav/nitce/fixme/base_gen_reassign_alt6.res
index 5bdd4bf614..e131b2ec7a 100644
--- a/tests/sav/nitce/fixme/base_gen_reassign_alt6.res
+++ b/tests/sav/nitce/fixme/base_gen_reassign_alt6.res
@@ -1,4 +1,4 @@
-Runtime error: Cast failed. Expected `OTHER`, got `Float` (../lib/core/kernel.nit:723)
+Runtime error: Cast failed. Expected `OTHER`, got `Float` (../lib/core/kernel.nit:728)
 11
 21
 31
diff --git a/tests/sav/nituml_args3.res b/tests/sav/nituml_args3.res
index a5a027f67e..fe264cef63 100644
--- a/tests/sav/nituml_args3.res
+++ b/tests/sav/nituml_args3.res
@@ -12,7 +12,7 @@ digraph G {
 					fontsize = 8
 				]
 Object [
- label = "{interface\nObject||+ object_id(): Int\l+ is_same_type(other: Object): Bool\l+ is_same_instance(other: nullable Object): Bool\l+ ==(other: nullable Object): Bool\l+ !=(other: nullable Object): Bool\l+ output()\l+ output_class_name()\l+ hash(): Int\l+ sys(): Sys\l+ init()\l}"
+ label = "{interface\nObject||+ object_id(): Int\l+ is_same_type(other: Object): Bool\l+ is_same_instance(other: nullable Object): Bool\l+ ==(other: nullable Object): Bool\l+ !=(other: nullable Object): Bool\l+ output()\l+ output_class_name()\l+ hash(): Int\l+ inspect_o()\l+ sys(): Sys\l+ init()\l}"
 ]
 
 Sys [
diff --git a/tests/sav/nituml_args4.res b/tests/sav/nituml_args4.res
index f03123ae1a..3223febd04 100644
--- a/tests/sav/nituml_args4.res
+++ b/tests/sav/nituml_args4.res
@@ -12,7 +12,7 @@ digraph G {
 					fontsize = 8
 				]
 Object [
- label = "{interface\nObject||+ object_id(): Int\l+ is_same_type(other: Object): Bool\l+ is_same_instance(other: nullable Object): Bool\l+ ==(other: nullable Object): Bool\l+ !=(other: nullable Object): Bool\l+ output()\l+ output_class_name()\l+ hash(): Int\l+ sys(): Sys\l+ init()\l}"
+ label = "{interface\nObject||+ object_id(): Int\l+ is_same_type(other: Object): Bool\l+ is_same_instance(other: nullable Object): Bool\l+ ==(other: nullable Object): Bool\l+ !=(other: nullable Object): Bool\l+ output()\l+ output_class_name()\l+ hash(): Int\l+ inspect_o()\l+ sys(): Sys\l+ init()\l}"
 ]
 
 Sys [