diff --git a/LibAutomaton/CellElement.c b/LibAutomaton/CellElement.c
index 96fc5c8..e0fbfa1 100644
--- a/LibAutomaton/CellElement.c
+++ b/LibAutomaton/CellElement.c
@@ -136,3 +136,4 @@ void FreeCellElement(cellElement* element) {
 	}
 	element = NULL;
 }
+
diff --git a/LibAutomaton/list.c b/LibAutomaton/list.c
index 8b8a7e1..e44b428 100644
--- a/LibAutomaton/list.c
+++ b/LibAutomaton/list.c
@@ -176,11 +176,11 @@ int DeleteListContent(List *list){
 		while (current != NULL){
 			toDelete = current;
 			current = current->next;
-
+/*
 			if (toDelete->data != NULL){
 				FreeCellElement(toDelete->data);
 			}
-
+*/
 			free(toDelete);
 		}
 		list->head = NULL;
diff --git a/LibAutomaton/matrix.c b/LibAutomaton/matrix.c
index a0b9154..620ec8f 100644
--- a/LibAutomaton/matrix.c
+++ b/LibAutomaton/matrix.c
@@ -157,7 +157,7 @@ int SupprMatrixElem(Matrix matrix, int ColPos, int RowPos){
 			tmp = tmp->nextCol;
 		}
 		if (tmp->nextCol == NULL){
-			return -3; /* WTF ?? */
+			return -3; /* should never happend */
 		} else {
 			tmp->nextCol = elem->nextCol;
 		}
@@ -184,7 +184,7 @@ int SupprMatrixElem(Matrix matrix, int ColPos, int RowPos){
 			tmp = tmp->nextRow;
 		}
 		if (tmp->nextRow == NULL){
-			return -4; /* WTF ?? */
+			return -4; /* should never happend */
 		} else {
 			tmp->nextRow = elem->nextRow;
 		}	
@@ -248,15 +248,70 @@ void BasicPrintMatrix(Matrix matrix){
 	printf("---END OF MATRIX---\n\n");
 }
 
+bool RecursiveFreeCol(Matrix matrix, cellElement * elem){
+	cellElement * tmp = NULL;
+	ListElement * Row = NULL;
+	
+	if (elem == NULL){
+		return ERROR;
+	}
+
+	if (elem->nextRow != NULL){
+		RecursiveFreeCol(matrix,elem->nextRow);
+	}
+	
+	if (elem->nextRow == NULL){
+	
+		Row = GetElementPos(matrix.rows,elem->rowIndex);
+	
+		if (Row == NULL || Row->data == NULL ){
+			return ERROR; /*should never happend*/
+		}
+
+		if (Row->data->colIndex == elem->colIndex){
+			Row->data = NULL;
+		} else {
+			tmp = Row->data;
+			while (tmp->nextCol != NULL && tmp->nextCol != elem){
+				tmp = tmp->nextCol;
+			}
+			if (tmp->nextCol == NULL){
+				return ERROR; /* should never happend */
+			} else {
+				tmp->nextCol = elem->nextCol;
+			}
+			
+		}
+
+		FreeCellElement(elem);
+		return true;
+	}
+
+	return false; /* should never happend */
+}
+
+
+
 Matrix freeMatrix(Matrix matrix){
+	ListElement * current = NULL;
+
 	matrix.colCount = 0;
 	matrix.rowCount = 0;
 	/*il faut free les cellElements car FreeList ne peut pas le faire*/
+	if (matrix.cols != NULL){
+		current= matrix.cols->head;
+		while (current != NULL){
+			RecursiveFreeCol(matrix,current->data);
+			current = current->next;
+		}
+	}
 	FreeList(matrix.cols);
 	FreeList(matrix.rows);
 	return matrix;
 }
 
+
+
 /* todos :
 *finir le freeMatrix
 *chasser les bugs
diff --git a/LibAutomaton/matrix.h b/LibAutomaton/matrix.h
index 92aca29..b1cbef5 100644
--- a/LibAutomaton/matrix.h
+++ b/LibAutomaton/matrix.h
@@ -110,7 +110,10 @@ Matrix SetMatrixDim(Matrix matrix,int nbCols,int nbRows);
 
 void BasicPrintMatrix(Matrix matrix);
 
+bool RecursiveFreeCol(Matrix matrix, cellElement * elem);
+
 Matrix freeMatrix(Matrix matrix);
 
+
 #endif