diff --git a/util/blueprint/blueprint.go b/util/blueprint/blueprint.go
index af16056..1a0fca1 100644
--- a/util/blueprint/blueprint.go
+++ b/util/blueprint/blueprint.go
@@ -32,7 +32,7 @@ func (bm *Blueprint) regSysNode(){
 	bm.RegExecNode(&Entrance_ArrayParam{})
 	bm.RegExecNode(&Entrance_IntParam{})
 	bm.RegExecNode(&Entrance_Timer{})
-	bm.RegExecNode(&Output{})
+	bm.RegExecNode(&DebugOutput{})
 	bm.RegExecNode(&Sequence{})
 	bm.RegExecNode(&Foreach{})
 	bm.RegExecNode(&ForeachIntArray{})
diff --git a/util/blueprint/node.go b/util/blueprint/node.go
index 944a54d..a292b08 100644
--- a/util/blueprint/node.go
+++ b/util/blueprint/node.go
@@ -155,7 +155,7 @@ func (en *execNode) Do(gr *Graph, outPortArgs ...any) error {
 
 	startOutIdx := en.execNode.GetOutPortParamStartIndex()
 	for i := 0; i < len(outPortArgs); i++ {
-		if i >= len(outPorts) {
+		if i+startOutIdx >= len(outPorts) {
 			return fmt.Errorf("args %d not found in node %s", i, en.execNode.GetName())
 		}
 
diff --git a/util/blueprint/sysnodes.go b/util/blueprint/sysnodes.go
index 285f097..8ba0728 100644
--- a/util/blueprint/sysnodes.go
+++ b/util/blueprint/sysnodes.go
@@ -53,15 +53,15 @@ func (em *Entrance_Timer) Exec() (int, error) {
 	return 0, nil
 }
 
-type Output struct {
+type DebugOutput struct {
 	BaseExecNode
 }
 
-func (em *Output) GetName() string {
-	return "Output"
+func (em *DebugOutput) GetName() string {
+	return "DebugOutput"
 }
 
-func (em *Output) Exec() (int, error) {
+func (em *DebugOutput) Exec() (int, error) {
 	val, ok := em.GetInPortInt(1)
 	if !ok {
 		return 0, fmt.Errorf("output Exec inParam not found")
@@ -77,7 +77,7 @@ func (em *Output) Exec() (int, error) {
 		return 0, fmt.Errorf("output Exec inParam not found")
 	}
 
-	fmt.Printf("output Exec inParam [%d] [%s] [%v]\n", val, valStr, valArray)
+	log.Debug("DebugOutput Exec",log.Any("param1",val),log.Any("param2",valStr),log.Any("param3",valArray))
 	return 0, nil
 }