diff --git a/ccp/js/methodlistcontroller.js b/ccp/js/methodlistcontroller.js
index 7ed4ec3..79c82ed 100644
--- a/ccp/js/methodlistcontroller.js
+++ b/ccp/js/methodlistcontroller.js
@@ -2,7 +2,7 @@ class CCPMethodList extends HTMLElement{
   
     #boot;
     #rootdoc;
-    #data;
+    #data = null;
     #filtered;
     #dragged = null;
     #searchfield = null;
@@ -197,8 +197,9 @@ class CCPMethodList extends HTMLElement{
     
     getCategoryHints(){
       const s = new Set()
+      if(this.#data === null) return [];
       for(let i=0; i < this.#data.length; i++){
-        const cat = m.metadata.filter(md=>md.role === "category").map(md=>md.title)
+        const cat = this.#data[i].metadata.filter(md=>md.role === "category").map(md=>md.title)
         s.add(cat)
       }
       return [...s]