diff --git a/java/src/main/java/org/astonbitecode/j4rs/utils/Utils.java b/java/src/main/java/org/astonbitecode/j4rs/utils/Utils.java
index 612df4e..7a705c0 100644
--- a/java/src/main/java/org/astonbitecode/j4rs/utils/Utils.java
+++ b/java/src/main/java/org/astonbitecode/j4rs/utils/Utils.java
@@ -16,9 +16,11 @@
 
 import java.io.PrintWriter;
 import java.io.StringWriter;
+import java.lang.reflect.InvocationTargetException;
 import java.util.Arrays;
 
 import org.astonbitecode.j4rs.api.dtos.GeneratedArg;
+import org.astonbitecode.j4rs.errors.InvocationException;
 
 public class Utils {
 
@@ -74,7 +76,12 @@ public static String throwableToString(Throwable throwable) {
         if (throwable != null) {
             StringWriter sw = new StringWriter();
             PrintWriter pw = new PrintWriter(sw);
-            throwable.printStackTrace(pw);
+            if (throwable != null && throwable instanceof InvocationException 
+                && throwable.getCause() != null && throwable.getCause() instanceof InvocationTargetException) {
+                throwable.getCause().getCause().printStackTrace(pw);
+            } else {
+                throwable.printStackTrace(pw);
+            }
             return sw.toString();
         } else {
             return "Cannot create String out of a null Throwable";
diff --git a/rust/jassets/j4rs-0.19.0-SNAPSHOT-jar-with-dependencies.jar b/rust/jassets/j4rs-0.19.0-SNAPSHOT-jar-with-dependencies.jar
index a6d9531..ce63c29 100644
Binary files a/rust/jassets/j4rs-0.19.0-SNAPSHOT-jar-with-dependencies.jar and b/rust/jassets/j4rs-0.19.0-SNAPSHOT-jar-with-dependencies.jar differ
diff --git a/rust/src/utils.rs b/rust/src/utils.rs
index f14ebc8..16e0e9e 100644
--- a/rust/src/utils.rs
+++ b/rust/src/utils.rs
@@ -134,6 +134,7 @@ fn find_j4rs_dynamic_libraries_dir_entries() -> errors::Result<Vec<fs::DirEntry>
             let file_name = entry.file_name();
             let file_name = file_name.to_str().unwrap();
             file_name.contains("j4rs")
+                && !file_name.contains("derive")
                 && (file_name.contains(".so")
                     || file_name.contains(".dll")
                     || file_name.contains(".dylib"))