diff --git a/src/ftest/ftest.c b/src/ftest/ftest.c
index 3ce1c17..86b396c 100644
--- a/src/ftest/ftest.c
+++ b/src/ftest/ftest.c
@@ -1,5 +1,5 @@
 #include "ftest/ftest.h"
-#include <dirent.h>
+//#include <dirent.h>
 
 /*
  * by default display in millisecond
@@ -1220,7 +1220,7 @@ final_parallel_test_()
 
   if(savelog){
     FILE *f_savelog;
-    f_savelog=fopen(savelog, "w+");
+    f_savelog=fopen(savelog, "a");
     for(size_t id_thrd =0 ; id_thrd <= parallel_nb; ++id_thrd){
       rewind(f_ou_th[id_thrd]); // put the file pointer to the begin of file;
       while(fgets(reader, 255,f_ou_th[id_thrd] )){
diff --git a/src/ftest/ftest.h b/src/ftest/ftest.h
index 8c9fcf2..cd2cd81 100644
--- a/src/ftest/ftest.h
+++ b/src/ftest/ftest.h
@@ -90,7 +90,7 @@ extern char *varHK_EQ, *varHK_TR, *varHK_RN, *varHK_DN, *varHK_OK, *varHK_FL, *v
         if (stream == NULL) { fprintf(stderr," error open_memstream %s:%d:%s \n",__FILE__,__LINE__,__func__); exit(0); }\
       fprintf(stream,  __VA_ARGS__); \
       fflush(stream);\
-      rewind(stream);\
+      /*rewind(stream);*/\
       if(is_parallel_nb){\
         long int id_thread=id_of_thread_executed();\
         if(log_parallel){\
@@ -112,13 +112,13 @@ extern char *varHK_EQ, *varHK_TR, *varHK_RN, *varHK_DN, *varHK_OK, *varHK_FL, *v
       } \
       else{\
          if(savelog){\
-            FILE *f_savelog = fopen(savelog,"w+");\
+            FILE *f_savelog = fopen(savelog,"a");\
             fprintf(f_savelog, "%s",buf);\
             fclose(f_savelog);\
          }\
-         else{\
+         /*else{*/\
             fprintf(F_OUT, "%s",buf);\
-         }\
+         /*}*/\
       }\
       fclose(stream);\
       free(buf);\
diff --git a/src/permutation_t/permutation_t.o b/src/permutation_t/permutation_t.o
deleted file mode 100644
index 154f6b5..0000000
Binary files a/src/permutation_t/permutation_t.o and /dev/null differ
diff --git a/src/set_theoric_t/set_theoric_t.o b/src/set_theoric_t/set_theoric_t.o
deleted file mode 100644
index 3c352e6..0000000
Binary files a/src/set_theoric_t/set_theoric_t.o and /dev/null differ