diff --git a/src/main/java/com/jme3/bullet/util/DebugShapeFactory.java b/src/main/java/com/jme3/bullet/util/DebugShapeFactory.java
index ceeed240..5a8f8a8c 100644
--- a/src/main/java/com/jme3/bullet/util/DebugShapeFactory.java
+++ b/src/main/java/com/jme3/bullet/util/DebugShapeFactory.java
@@ -382,9 +382,9 @@ private static Transform planeTransform(PlaneCollisionShape shape) {
     // *************************************************************************
     // native private methods
 
-    native private static void getTriangles(
+    native private static boolean getTriangles(
             long shapeId, int meshResolution, DebugMeshCallback buffer);
 
-    native private static void getVertices(
+    native private static boolean getVertices(
             long shapeId, int meshResolution, DebugMeshCallback buffer);
 }
diff --git a/src/main/native/glue/com_jme3_bullet_util_DebugShapeFactory.cpp b/src/main/native/glue/com_jme3_bullet_util_DebugShapeFactory.cpp
index 4ca948fc..886c0179 100644
--- a/src/main/native/glue/com_jme3_bullet_util_DebugShapeFactory.cpp
+++ b/src/main/native/glue/com_jme3_bullet_util_DebugShapeFactory.cpp
@@ -78,13 +78,13 @@ class DebugCallback : public btTriangleCallback, public btInternalTriangleIndexC
 /*
  * Class:     com_jme3_bullet_util_DebugShapeFactory
  * Method:    getTriangles
- * Signature: (JILcom/jme3/bullet/util/DebugMeshCallback;)V
+ * Signature: (JILcom/jme3/bullet/util/DebugMeshCallback;)Z
  */
-JNIEXPORT void JNICALL Java_com_jme3_bullet_util_DebugShapeFactory_getTriangles
+JNIEXPORT jboolean JNICALL Java_com_jme3_bullet_util_DebugShapeFactory_getTriangles
 (JNIEnv *pEnv, jclass, jlong shapeId, jint resolution, jobject callback) {
     const btCollisionShape * const
             pShape = reinterpret_cast<btCollisionShape *> (shapeId);
-    NULL_CHK(pEnv, pShape, "The btCollisionShape does not exist.",);
+    NULL_CHK(pEnv, pShape, "The btCollisionShape does not exist.", JNI_FALSE);
 
     if (pShape->isConcave()) {
         const btConcaveShape * const pConcave = (btConcaveShape *) pShape;
@@ -120,32 +120,34 @@ JNIEXPORT void JNICALL Java_com_jme3_bullet_util_DebugShapeFactory_getTriangles
             pEnv->CallVoidMethod(callback,
                     jmeClasses::DebugMeshCallback_addVector, vertexA.getX(),
                     vertexA.getY(), vertexA.getZ());
-            EXCEPTION_CHK(pEnv,);
+            EXCEPTION_CHK(pEnv, JNI_FALSE);
 
             pEnv->CallVoidMethod(callback,
                     jmeClasses::DebugMeshCallback_addVector, vertexB.getX(),
                     vertexB.getY(), vertexB.getZ());
-            EXCEPTION_CHK(pEnv,);
+            EXCEPTION_CHK(pEnv, JNI_FALSE);
 
             pEnv->CallVoidMethod(callback,
                     jmeClasses::DebugMeshCallback_addVector, vertexC.getX(),
                     vertexC.getY(), vertexC.getZ());
-            EXCEPTION_CHK(pEnv,);
+            EXCEPTION_CHK(pEnv, JNI_FALSE);
         }
         delete pHull; //dance027
     }
+
+    return JNI_TRUE; // success!
 }
 
 /*
  * Class:     com_jme3_bullet_util_DebugShapeFactory
  * Method:    getVertices
- * Signature: (JILcom/jme3/bullet/util/DebugMeshCallback;)V
+ * Signature: (JILcom/jme3/bullet/util/DebugMeshCallback;)Z
  */
-JNIEXPORT void JNICALL Java_com_jme3_bullet_util_DebugShapeFactory_getVertices
+JNIEXPORT jboolean JNICALL Java_com_jme3_bullet_util_DebugShapeFactory_getVertices
 (JNIEnv *pEnv, jclass, jlong shapeId, jint resolution, jobject callback) {
     const btCollisionShape * const
             pShape = reinterpret_cast<btCollisionShape *> (shapeId);
-    NULL_CHK(pEnv, pShape, "The btCollisionShape does not exist.",);
+    NULL_CHK(pEnv, pShape, "The btCollisionShape does not exist.", JNI_FALSE);
 
     if (pShape->isConcave()) {
         const btConcaveShape * const pConcave = (btConcaveShape *) pShape;
@@ -175,8 +177,10 @@ JNIEXPORT void JNICALL Java_com_jme3_bullet_util_DebugShapeFactory_getVertices
             pEnv->CallVoidMethod(callback,
                     jmeClasses::DebugMeshCallback_addVector, vertex.getX(),
                     vertex.getY(), vertex.getZ());
-            EXCEPTION_CHK(pEnv,);
+            EXCEPTION_CHK(pEnv, JNI_FALSE);
         }
         delete pHull; //dance026
     }
+
+    return JNI_TRUE; // success!
 }
diff --git a/src/main/native/glue/com_jme3_bullet_util_DebugShapeFactory.h b/src/main/native/glue/com_jme3_bullet_util_DebugShapeFactory.h
index 27345d40..8278f76f 100644
--- a/src/main/native/glue/com_jme3_bullet_util_DebugShapeFactory.h
+++ b/src/main/native/glue/com_jme3_bullet_util_DebugShapeFactory.h
@@ -16,17 +16,17 @@ extern "C" {
 /*
  * Class:     com_jme3_bullet_util_DebugShapeFactory
  * Method:    getTriangles
- * Signature: (JILcom/jme3/bullet/util/DebugMeshCallback;)V
+ * Signature: (JILcom/jme3/bullet/util/DebugMeshCallback;)Z
  */
-JNIEXPORT void JNICALL Java_com_jme3_bullet_util_DebugShapeFactory_getTriangles
+JNIEXPORT jboolean JNICALL Java_com_jme3_bullet_util_DebugShapeFactory_getTriangles
   (JNIEnv *, jclass, jlong, jint, jobject);
 
 /*
  * Class:     com_jme3_bullet_util_DebugShapeFactory
  * Method:    getVertices
- * Signature: (JILcom/jme3/bullet/util/DebugMeshCallback;)V
+ * Signature: (JILcom/jme3/bullet/util/DebugMeshCallback;)Z
  */
-JNIEXPORT void JNICALL Java_com_jme3_bullet_util_DebugShapeFactory_getVertices
+JNIEXPORT jboolean JNICALL Java_com_jme3_bullet_util_DebugShapeFactory_getVertices
   (JNIEnv *, jclass, jlong, jint, jobject);
 
 #ifdef __cplusplus