diff --git a/scenarios/scripts/p300-tactile-stimulator.lua b/scenarios/scripts/p300-tactile-stimulator.lua
index 2796393..9f8e4e3 100644
--- a/scenarios/scripts/p300-tactile-stimulator.lua
+++ b/scenarios/scripts/p300-tactile-stimulator.lua
@@ -51,7 +51,7 @@ function initialize(box)
 	--load box settings
 	row_base = _G[box:get_setting(2)]
 	col_base = _G[box:get_setting(3)] 
-	n_rows = box:get_setting(4)
+	n_tactilos = box:get_setting(4)
 	n_repetitions = box:get_setting(5)
 	flash_duration = box:get_setting(7)
 	noflash_duration = box:get_setting(8)
@@ -72,7 +72,7 @@ function initialize(box)
 	send = false
 	experiment_end = false
 	tactilo_stimcodes = {}
-	for x = 1, n_rows do
+	for x = 1, n_tactilos do
 		tactilo_stimcodes[x] = row_base + x - 1
 	end
 end
diff --git a/scenarios/scripts/p300-tactile-target.lua b/scenarios/scripts/p300-tactile-target.lua
index b6473b0..28967ff 100644
--- a/scenarios/scripts/p300-tactile-target.lua
+++ b/scenarios/scripts/p300-tactile-target.lua
@@ -9,10 +9,11 @@ function initialize(box)
 	dofile(box:get_config("${Path_Data}") .. "/plugins/stimulation/lua-stimulator-stim-codes.lua")
 
 	math.randomseed(os.time())
-	row_base = _G[box:get_setting(2)]
-	col_base = _G[box:get_setting(3)]
-	delay = box:get_setting(4)
-	if box:get_setting(5) == 'true' then
+	row_base   = _G[box:get_setting(2)]
+	col_base   = _G[box:get_setting(3)]
+	n_tactilos = box:get_setting(4)
+	delay = box:get_setting(5)
+	if box:get_setting(6) == 'true' then
 		free_spelling = true
 	else
 		free_spelling = false
@@ -44,7 +45,7 @@ function process(box)
 				if stimulation_id == OVTK_StimulationId_RestStart then
 
 					-- triggers the target
-					box:send_stimulation(1, row_base+math.random(1,6)-1, t+delay, 0)
+					box:send_stimulation(1, row_base+math.random(1,n_tactilos)-1, t+delay, 0)
 					box:send_stimulation(1, col_base, t+delay, 0)
 
 				elseif stimulation_id == OVTK_StimulationId_ExperimentStop then