diff --git a/lib/generator.js b/lib/generator.js
index 10efa7d69..9d7e5bcf0 100644
--- a/lib/generator.js
+++ b/lib/generator.js
@@ -355,6 +355,13 @@ class Generator {
       if (!document) {
         const err = new Error('Input is not a correct AsyncAPI document so it cannot be processed.');
         err.diagnostics = diagnostics;
+        for (const diag of diagnostics) {
+          console.error(
+            `Diagnostic err: ${diag['message']} in path ${JSON.stringify(diag['path'])} starting `+
+            `L${diag['range']['start']['line'] + 1} C${diag['range']['start']['character']}, ending `+
+            `L${diag['range']['end']['line'] + 1} C${diag['range']['end']['character']}`
+          );
+        }
         throw err;
       } else {
         this.asyncapi = document;