diff --git a/src/git.xdrm.io/schastsp/server/server.go b/src/git.xdrm.io/schastsp/server/server.go
index d0aa236..7b68c3e 100644
--- a/src/git.xdrm.io/schastsp/server/server.go
+++ b/src/git.xdrm.io/schastsp/server/server.go
@@ -84,14 +84,14 @@ func (s *T) HandleRequest(req io.Reader, res io.Writer) error {
 	/* (1) Read x1 */
 	x1 := make([]byte, scha.HSIZE);
 	read, err := req.Read(x1);
-	if err != nil { return err }
-	if uint16(read) != scha.HSIZE { return errors.New("Cannot read enough bytes") }
+	if err != nil { return fmt.Errorf("Reading x1 : %s", err) }
+	if uint16(read) != scha.HSIZE { return fmt.Errorf("Cannot read x1 : %d / %d bytes available", read, scha.HSIZE) }
 
 	/* (2) Read x2 */
 	x2 := make([]byte, scha.HSIZE);
 	read, err = req.Read(x2);
-	if err != nil { return err }
-	if uint16(read) != scha.HSIZE { return errors.New("Cannot read enough bytes") }
+	if err != nil { return fmt.Errorf("Reading x2 : %s", err) }
+	if uint16(read) != scha.HSIZE { return fmt.Errorf("Cannot read x2 : %d / %d bytes available", read, scha.HSIZE) }
 
 	/* (3) Manage request */
 	errCode, err := s.manageRequest(x1, x2)