diff --git a/packages/basic.gblib/services/DialogKeywords.ts b/packages/basic.gblib/services/DialogKeywords.ts
index 62e32b3a..389406e2 100644
--- a/packages/basic.gblib/services/DialogKeywords.ts
+++ b/packages/basic.gblib/services/DialogKeywords.ts
@@ -697,7 +697,10 @@ export class DialogKeywords {
    */
   public async userName({ pid }) {
     let { min, user, params } = await DialogKeywords.getProcessInfo(pid);
-    return user.userName;
+    if (user)
+      return user.userName;
+    else
+      return 'unattended';
   }
 
   /**