diff --git a/src/main/java/org/openhab/automation/jrule/internal/handler/JRuleHandler.java b/src/main/java/org/openhab/automation/jrule/internal/handler/JRuleHandler.java
index c2fe7c30..7eff5e07 100644
--- a/src/main/java/org/openhab/automation/jrule/internal/handler/JRuleHandler.java
+++ b/src/main/java/org/openhab/automation/jrule/internal/handler/JRuleHandler.java
@@ -508,19 +508,21 @@ public Class<?> loadClass(String name) throws ClassNotFoundException {
             try {
                 for (URL url : getURLs()) {
                     if (url.getProtocol().equals("file")) {
-                        FileInputStream is = new FileInputStream(
-                                url.getFile() + "/" + name.replaceAll("\\.", "/") + JRuleConstants.CLASS_FILE_TYPE);
-                        if (is != null) {
-                            byte[] buf = is.readAllBytes();
-                            is.close();
-                            return defineClass(name, is.readAllBytes(), 0, buf.length);
+                        File classFile = new File(url.getPath(),
+                                name.replaceAll("\\.", "/") + JRuleConstants.CLASS_FILE_TYPE);
+                        if (classFile.exists()) {
+                            FileInputStream is = new FileInputStream(classFile);
+                            if (is != null) {
+                                byte[] buf = is.readAllBytes();
+                                is.close();
+                                return defineClass(name, buf, 0, buf.length);
+                            }
                         }
                     }
                 }
                 return super.loadClass(name);
-
             } catch (IOException e) {
-                JRuleLog.warn(logger, LOG_NAME_HANDLER, e.getMessage());
+                JRuleLog.warn(logger, LOG_NAME_HANDLER, "Trouble loading class {}: {}", name, e.toString());
                 return super.loadClass(name);
             }
         }