diff --git a/xorriso/xorriso.h b/xorriso/xorriso.h
index 5cf38543..afc26bf5 100644
--- a/xorriso/xorriso.h
+++ b/xorriso/xorriso.h
@@ -689,6 +689,8 @@ int Xorriso_pull_outlists(struct XorrisO *xorriso, int stack_handle,
                           to be directed to stdout resp. to be interpreted
                           as -pkt_output format if this is enabled by
                           Xorriso_option_pkt_output().
+                          The function should return 1. A return value of -1
+                          urges not to call again with further lines.
     @param result_handle  The first argument of (*result_handler)(). It shall
                           point to a memory object that knows all necessary
                           external parameters for running (*result_handler)().
@@ -696,6 +698,8 @@ int Xorriso_pull_outlists(struct XorrisO *xorriso, int stack_handle,
     @param info_handler   Pointer to the function which shall be called with
                           each info message. A NULL pointer causes output to
                           be directed to stderr resp. to -as mkisofs -log-file.
+                          The function should return 1. A return value of -1
+                          urges not to call again with further lines.
     @param info_handle    The first argument of (*info_handler)(). It shall
                           point to a memory object that knows all necessary
                           external parameters for running (*info_handler)().
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index c227b0b3..b03b9278 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2012.09.16.141845"
+#define Xorriso_timestamP "2012.09.21.115522"