Problem in jni getting object from methodst

Question

a want to save an object gatin from java and save it into my list in c code
my probleme is when a call getobject more than one times it return null (in the first one it return the last object saved)
i dont understand why
this is my methods
to add object in my list
NIEXPORT void JNICALL Java_Matrice2_ajoutercell
(JNIEnv *env, jobject obj, jint lig, jint col,jobject objectadded){
AjouterCellule(objectadded ,lig,col,recupererAdresse(env,obj));
// this is a method created to save the ovject in my list
// ( in Ajoutercell a save my object like this
List->element = val;
struct list {....
jobject val
]*list;
the code work good if i use jint
--- and this is the method to getobject
JNIEXPORT jobject JNICALL Java_Matrice2_Getcell
(JNIEnv *env, jobject obj , jint lig, jint col){
return recuperercell(recupererAdresse(env,obj),lig,col);
// the method recuperercell get the object from my list
return List->valr;
i hope that some one can understand my code and help me
thanks ...

Answer 1

i use newglobalref and it work ; but i have to delete every ref created when i delete or modify an object
thanks to you