diff --git a/src/de/inetsoftware/jwebassembly/JWebAssembly.java b/src/de/inetsoftware/jwebassembly/JWebAssembly.java
index 537c81f..1d57d36 100644
--- a/src/de/inetsoftware/jwebassembly/JWebAssembly.java
+++ b/src/de/inetsoftware/jwebassembly/JWebAssembly.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 - 2020 Volker Berlin (i-net software)
+ * Copyright 2017 - 2022 Volker Berlin (i-net software)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -362,7 +362,11 @@ public class JWebAssembly {
                 ClassFile classFile = new ClassFile( new BufferedInputStream( url.openStream() ) );
                 generator.prepare( classFile );
             } catch( IOException ex ) {
-                throw WasmException.create( "Parsing of file " + url + " failed.", ex );
+                LOGGER.fine( url + " " + ex );
+                if( url.getFile().endsWith( ".class" ) ) {
+                    throw WasmException.create( "Parsing of file " + url + " failed.", ex );
+                }
+                // does not throw an exception on non *.class files like resource files or *.kotlin_module
             }
         }
         generator.prepareFinish();