diff --git a/blackboard/bb_param/bb_param.cpp b/blackboard/bb_param/bb_param.cpp
index 2ed1929..d4663fe 100644
--- a/blackboard/bb_param/bb_param.cpp
+++ b/blackboard/bb_param/bb_param.cpp
@@ -72,6 +72,7 @@ Variant BBParam::get_value(Object *p_agent, const Ref<Blackboard> &p_blackboard,
 	if (value_source == SAVED_VALUE) {
 		return saved_value;
 	} else {
+		ERR_FAIL_COND_V_MSG(!p_blackboard->has_var(variable), Variant(), vformat("BBParam: Blackboard variable doesn't exist: \"%s\".", p_default));
 		return p_blackboard->get_var(variable, p_default);
 	}
 }
@@ -94,7 +95,7 @@ void BBParam::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_type"), &BBParam::get_type);
 	ClassDB::bind_method(D_METHOD("get_value", "p_agent", "p_blackboard", "p_default"), &BBParam::get_value, Variant());
 
-	ADD_PROPERTY(PropertyInfo(Variant::INT, "value_source", PROPERTY_HINT_ENUM, "Saved Value, Blackboard Var"), "set_value_source", "get_value_source");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "value_source", PROPERTY_HINT_ENUM, "Saved Value,Blackboard Var"), "set_value_source", "get_value_source");
 	ADD_PROPERTY(PropertyInfo(Variant::STRING, "variable", PROPERTY_HINT_NONE, "", 0), "set_variable", "get_variable");
 	ADD_PROPERTY(PropertyInfo(Variant::NIL, "saved_value", PROPERTY_HINT_NONE, "", 0), "set_saved_value", "get_saved_value");
 
diff --git a/bt/actions/bt_set_var.cpp b/bt/actions/bt_set_var.cpp
index 4f6e2fb..561dc7e 100644
--- a/bt/actions/bt_set_var.cpp
+++ b/bt/actions/bt_set_var.cpp
@@ -19,7 +19,7 @@ String BTSetVar::_generate_name() const {
 	if (variable.is_empty()) {
 		return "SetVar ???";
 	}
-	return vformat("SetVar %s = %s", LimboUtility::get_singleton()->decorate_var(variable),
+	return vformat("Set %s = %s", LimboUtility::get_singleton()->decorate_var(variable),
 			value.is_valid() ? Variant(value) : Variant("???"));
 }
 
diff --git a/demo/ai/trees/variables.tres b/demo/ai/trees/variables.tres
index 87b26b4..2fbc380 100644
--- a/demo/ai/trees/variables.tres
+++ b/demo/ai/trees/variables.tres
@@ -1,4 +1,34 @@
-[gd_resource type="BehaviorTree" load_steps=6 format=3 uid="uid://cvm3gqes75f53"]
+[gd_resource type="BehaviorTree" load_steps=13 format=3 uid="uid://cvm3gqes75f53"]
+
+[sub_resource type="BBVariant" id="BBVariant_t70f2"]
+resource_name = "false"
+saved_value = false
+type = 1
+
+[sub_resource type="BTSetVar" id="BTSetVar_nxwdg"]
+variable = "triggered"
+value = SubResource("BBVariant_t70f2")
+
+[sub_resource type="BTRunLimit" id="BTRunLimit_mlytb"]
+children = [SubResource("BTSetVar_nxwdg")]
+
+[sub_resource type="BBVariant" id="BBVariant_8bpg1"]
+resource_name = "false"
+saved_value = false
+type = 1
+
+[sub_resource type="BTCheckVar" id="BTCheckVar_g5b0s"]
+variable = "triggered"
+value = SubResource("BBVariant_8bpg1")
+
+[sub_resource type="BBVariant" id="BBVariant_loenl"]
+resource_name = "true"
+saved_value = true
+type = 1
+
+[sub_resource type="BTSetVar" id="BTSetVar_u051c"]
+variable = "triggered"
+value = SubResource("BBVariant_loenl")
 
 [sub_resource type="BBVariant" id="BBVariant_cu1uc"]
 resource_name = "Hello, World!"
@@ -14,10 +44,10 @@ text = "Message is: %s"
 bb_format_parameters = PackedStringArray("message")
 
 [sub_resource type="BTSequence" id="BTSequence_bhar3"]
-children = [SubResource("BTSetVar_2e0uw"), SubResource("BTConsolePrint_533ui")]
+children = [SubResource("BTCheckVar_g5b0s"), SubResource("BTSetVar_u051c"), SubResource("BTSetVar_2e0uw"), SubResource("BTConsolePrint_533ui")]
 
-[sub_resource type="BTRunLimit" id="BTRunLimit_hv3vu"]
-children = [SubResource("BTSequence_bhar3")]
+[sub_resource type="BTSelector" id="BTSelector_ndrjh"]
+children = [SubResource("BTRunLimit_mlytb"), SubResource("BTSequence_bhar3")]
 
 [resource]
-root_task = SubResource("BTRunLimit_hv3vu")
+root_task = SubResource("BTSelector_ndrjh")