diff --git a/code/nel/tools/pipeline/max/builtin/app_data.cpp b/code/nel/tools/pipeline/max/builtin/app_data.cpp
index 931b2c33c..53ee427fd 100644
--- a/code/nel/tools/pipeline/max/builtin/app_data.cpp
+++ b/code/nel/tools/pipeline/max/builtin/app_data.cpp
@@ -237,7 +237,7 @@ const uint8 *CAppData::read(NLMISC::CClassId classId, TSClassId superClassId, ui
 	if (ChunksOwnsPointers) { nlwarning("Not parsed"); return NULL; }
 	TKey key(classId, superClassId, subId);
 	TMap::const_iterator it = m_Entries.find(key);
-	if (it == m_Entries.end()) { return NULL; }
+	if (it == m_Entries.end()) { nldebug("Trying to read non-existant key, this is allowed, returning NULL"); return NULL; }
 	size = it->second->value()->Value.size();
 	return &it->second->value()->Value[0];
 }
@@ -291,7 +291,7 @@ void CAppData::erase(NLMISC::CClassId classId, TSClassId superClassId, uint32 su
 	if (ChunksOwnsPointers) { nlwarning("Not parsed"); return; }
 	TKey key(classId, superClassId, subId);
 	TMap::const_iterator it = m_Entries.find(key);
-	if (it == m_Entries.end()) { nldebug("Erasing non-existant key, this is allowed, doing nothing"); return; }
+	if (it == m_Entries.end()) { nldebug("Trying to erase non-existant key, this is allowed, doing nothing"); return; }
 	m_Entries.erase(key);
 }
 
diff --git a/code/nel/tools/pipeline/max/builtin/app_data.h b/code/nel/tools/pipeline/max/builtin/app_data.h
index a1caace9d..6b4a48664 100644
--- a/code/nel/tools/pipeline/max/builtin/app_data.h
+++ b/code/nel/tools/pipeline/max/builtin/app_data.h
@@ -54,7 +54,7 @@ class CAppDataEntry;
  */
 class CAppData : public CStorageContainer
 {
-private:
+public:
 	struct TKey
 	{
 		TKey(NLMISC::CClassId classId, TSClassId superClassId, uint32 subId);
@@ -95,6 +95,10 @@ public:
 	/// Erases an appdata chunk.
 	void erase(NLMISC::CClassId classId, TSClassId superClassId, uint32 subId);
 
+	// read access
+	/// Return the entries map, do not modify directly
+	inline const TMap &entries() const { return m_Entries; }
+
 protected:
 	virtual IStorageObject *createChunkById(uint16 id, bool container);
 
diff --git a/code/nel/tools/pipeline/max/storage_object.h b/code/nel/tools/pipeline/max/storage_object.h
index 4363b20da..e14b886c4 100644
--- a/code/nel/tools/pipeline/max/storage_object.h
+++ b/code/nel/tools/pipeline/max/storage_object.h
@@ -91,6 +91,7 @@ public:
 	// public data
 	typedef std::pair<uint16, IStorageObject *> TStorageObjectWithId;
 	typedef std::list<TStorageObjectWithId> TStorageObjectContainer;
+	typedef TStorageObjectContainer::iterator TStorageObjectIterator;
 	TStorageObjectContainer Chunks;
 
 protected:
diff --git a/code/nel/tools/pipeline/max_dump/main.cpp b/code/nel/tools/pipeline/max_dump/main.cpp
index 9c874106e..1ab6a3b05 100644
--- a/code/nel/tools/pipeline/max_dump/main.cpp
+++ b/code/nel/tools/pipeline/max_dump/main.cpp
@@ -27,6 +27,9 @@
 #include "../max/scene.h"
 #include "../max/scene_class_registry.h"
 
+// Testing
+#include "../max/builtin/app_data.h"
+
 //static const char *filename = "/srv/work/database/interfaces/anims_max/cp_fy_hof_species.max";
 static const char *filename = "/home/kaetemi/source/minimax/GE_Acc_MikotoBaniere.max";
 //static const char *filename = "/home/kaetemi/3dsMax/scenes/test2008.max";
@@ -162,6 +165,32 @@ int main(int argc, char **argv)
 	//std::cout << "\n";
 
 
+	// TEST APP DATA
+
+#define MAXSCRIPT_UTILITY_CLASS_ID (NLMISC::CClassId(0x04d64858, 0x16d1751d))
+#define UTILITY_CLASS_ID (4128)
+#define NEL3D_APPDATA_ENV_FX (84682543)
+
+	PIPELINE::MAX::CSceneClassContainer *ssc = scene.container();
+	for (PIPELINE::MAX::CStorageContainer::TStorageObjectIterator it = ssc->Chunks.begin(), end = ssc->Chunks.end(); it != end; ++it)
+	{
+		PIPELINE::MAX::CStorageContainer *subc = static_cast<PIPELINE::MAX::CStorageContainer *>(it->second);
+		for (PIPELINE::MAX::CStorageContainer::TStorageObjectIterator subit = subc->Chunks.begin(), subend = subc->Chunks.end(); subit != subend; ++subit)
+		{
+			PIPELINE::MAX::IStorageObject *storageChunk = subit->second;
+			PIPELINE::MAX::CAppData *appData = dynamic_cast<PIPELINE::MAX::CAppData *>(storageChunk);
+			if (appData)
+			{
+				nlinfo("Found AppData");
+				uint32 size;
+				const uint8 *buffer = appData->read(MAXSCRIPT_UTILITY_CLASS_ID, UTILITY_CLASS_ID, NEL3D_APPDATA_ENV_FX, size);
+				if (buffer)
+				{
+					nlinfo("Found NEL3D_APPDATA_ENV_FX, size %i", size);
+				}
+			}
+		}
+	}
 
 /*
 	GsfInput *input = gsf_infile_child_by_name(infile, streamname);