diff --git a/op.js b/op.js
index 651e7226..69610ebf 100644
--- a/op.js
+++ b/op.js
@@ -451,6 +451,10 @@ function clean_proto_gen() {
     const read = fs.readFileSync(file);
     var rd = read.toString();
 
+    if (file.match("Unk")) {
+      console.log("unk: " + file);
+    }
+
     // find import
     while ((m = regex.exec(rd)) !== null) {
       // This is necessary to avoid infinite loops with zero-width matches
@@ -465,6 +469,9 @@ function clean_proto_gen() {
           if (found_rt) {
             //console.log(`Skip ${match}`);
           } else {
+            if (match.match("Unk") || file.match("Unk")) {
+              console.log(file + " require " + match);
+            }
             var subdata = new Object();
             subdata["name"] = match;
             file_toaddmore.push(subdata);
@@ -505,6 +512,7 @@ function clean_proto_gen() {
 
     if (todoremove) {
       found_needclean++;
+      console.log("Remove file: "+file);
       try {
         fs.unlinkSync(file);
         //file removed