diff --git a/xorriso/text_io.c b/xorriso/text_io.c
index b5bbbe34..d8bf6763 100644
--- a/xorriso/text_io.c
+++ b/xorriso/text_io.c
@@ -1625,7 +1625,7 @@ int Xorriso_sieve_get_result(struct XorrisO *xorriso, char *name,
  continue;
    *available= f->num_results - f->num_delivered;
    if(*available <= 0)
- break;
+     return(0);
    if(flag & 2)
      return(1);
 
@@ -1672,7 +1672,7 @@ int Xorriso_sieve_get_result(struct XorrisO *xorriso, char *name,
    (*available)--;
    return(1);
  }
- return(0);
+ return(-2);
 no_mem:
  if(*argv != NULL)
    Xorriso__dispose_words(argc, argv);
@@ -1790,27 +1790,33 @@ int Xorriso_sieve_big(struct XorrisO *xorriso, int flag)
                                                { 0, -1, -1, -1, -1, -1}, 1, 1},
    {"libisoburn in use :", 3, "libisoburn in use :", ", ", 2,
                                                { 0,  1, -1, -1, -1, -1}, 1, 1},
+   {"File damaged :", 3, "File damaged :", "", 4, { 0,  2,  4,  6, -1, -1},
+                                                                     10000, 0},
+   {"File data lba:", 3, "File data lba:", "", 5, { 0,  2,  4,  6,  8, -1},
+                                                                     10000, 0},
+   {"MD5 MISMATCH:", 3, "MD5 MISMATCH:", "", 1, { 0, -1, -1, -1, -1, -1},
+                                                                     10000, 0},
+   {"Size lower   :", 3, "Size lower   :", "", 1, { 0, -1, -1, -1, -1, -1},
+                                                                         1, 0},
+   {"Size upper   :", 3, "Size upper   :", "", 1, { 0, -1, -1, -1, -1, -1},
+                                                                         1, 0},
    {"@", 0, "@", "", 0, {-1, -1, -1, -1, -1, -1}, 0, 0}
  };
 
-/* Problem cases:
-   <<<
+/* >>> Problem cases:
+
    -devices -device_links
    have no well recognizable prefix
 
    -pwd -pwdx
    have a headline and a value line
+   -> outlist stack
 
    -ls* , -getfacl* , -getfattr* , -du* , -compare* , -show_stream*
    have no well recognizable prefix
-
-   Todo:
-   -find -exec
-      report_damage report_lba getfacl getfattr get_any_xattr list_extattr
-      get_md5 check_md5 get_hfs_crtp get_hfs_bless show_stream estimate_size
-      
-
+   -> outlist stack
 */
+
  struct Xorriso_sieve_big_filteR *f;
  int ret, i, num_filters= 1000;
 
diff --git a/xorriso/xorriso.h b/xorriso/xorriso.h
index eb968ff4..e74528af 100644
--- a/xorriso/xorriso.h
+++ b/xorriso/xorriso.h
@@ -583,15 +583,16 @@ int Xorriso_process_errfile(struct XorrisO *xorriso,
                             int flag);
 
 
-/* -------------------- Message output evaluation API -------------------- */
+/*
+                           Message output evaluation
 
-/* xorriso is basically a dialog software which reacts on commands by
+   xorriso is basically a dialog software which reacts on commands by
    side effects and by messages. The side effects manipulate the state of
    the ISO image model and of drives. This state can be inquired by commands
    which emit messages.
 
-   There are several API approaches how a program can receive and use the
-   message output of xorriso.
+   There are several approaches how a program that uses xorriso via this API
+   can receive and use the message output of xorriso.
 
    - The message sieve may be programmed to pick certain information snippets
      out of the visible message stream. This covers all messages on the
@@ -611,17 +612,27 @@ int Xorriso_process_errfile(struct XorrisO *xorriso,
      All interpretation of the messages has to be done by the user of the
      xorriso API. Function Xorriso_parse_line() is intended to help with
      splitting up messages into words.
-     The outlist stack is handy for catching the result channel of information
-     commands with large uniform output like -lsl, -getfacl, -status. 
+     The outlist stack is handy for catching the results of information
+     commands with large uniform output or no well recognizable message
+     prefix. Like -lsl, -getfacl, -status, -find ... -exec get_md5.
+     One should push the stack before the command, pull it afterwards, examine
+     the text list by Xorriso_lst_get_*(), and finally dispose the list.
 
    - The message watcher is a separate program thread which uses the outlist
      stack to catch the messages and to call user provided handler functions.
      These functions can use Xorriso_parse_line() too, if they submit the
-     xorriso parameter as NULL.
+     xorriso parameter as NULL. They may not use the struct XorrisO object
+     in any way.
+     Synchronization between watcher and emitters of commands can be achived
+     by Xorriso_peek_outlists().
      The main motivation for the message watcher is to inspect and display
-     messages of long lasting xorriso commands like -commit, -blank, -format.
+     messages of long lasting xorriso commands while they are still executing.
+     E.g. of -commit, -blank, -format.
+     One would normally start it before such a command and stop it afterwards.
+     But of course, the watcher can stay activated all the time and process
+     all message output via its handler calls.i
 
-   The sieve does not interfere with outlists and message watcher.
+   The message sieve does not interfere with outlists and message watcher.
    The message watcher will only see messages which are not caught by outlists
    which were enabled after the watcher thread was started.
      
@@ -691,6 +702,10 @@ int Xorriso_sieve_add_filter(struct XorrisO *xorriso, char *name,
                             Do not allocate memory.
                       bit2= If *argv is not NULL, then free it before attaching
                             new memory.
+    @return           <0 error: -1 = memor shortage
+                                -2 = no filter rule found
+                       0 no more data available for the given name
+                      >0 argc and argv are valid
 */
 int Xorriso_sieve_get_result(struct XorrisO *xorriso, char *name,
                              int *argc, char ***argv, int *available,
@@ -763,6 +778,18 @@ int Xorriso_sieve_dispose(struct XorrisO *xorriso, int flag);
     "Ext. filters :" up to 1 result from -list_extras
                      argv[0]= "yes" or "no" , possibly more info
                      (Note: prefix is "Ext. filters : ")
+    "File damaged :" up to 10000 results from -find ... -exec report_damage
+                     argv[0]= damage start byte in file
+                     argv[1]= damage range size in file
+                     argv[2]= file size
+                     argv[3]= path in ISO image
+    "File data lba:" up to 10000 results from -find ... -exec report_lba
+                     argv[0]= extent number (all extents of same path together
+                              are the content of one file)
+                     argv[1]= start block number of extent
+                     argv[2]= number of blocks of extent
+                     argv[3]= overall file content size in all extents
+                     argv[4]= path in ISO image
     "Format idx   :" up to 100 results from -list_formats
                      argv[0]= index
                      argv[1]= MMC code
@@ -785,6 +812,8 @@ int Xorriso_sieve_dispose(struct XorrisO *xorriso, int flag);
                      argv[0]= "yes" or "no"
     "Local xattr  :" up to 1 result from -list_extras
                      argv[0]= "yes" or "no"
+    "MD5 MISMATCH:"  up to 10000 results from -check_md5*
+                     argv[0]= path of mismatching file
     "MD5 tag range:" up to 10000 results from -check_media
                      argv[0]= lba
                      argv[1]= size in blocks
@@ -826,6 +855,10 @@ int Xorriso_sieve_dispose(struct XorrisO *xorriso, int flag);
                      (Note: prefix is "Publisher Id : ")
     "Readline     :" up to 1 result from -list_extras
                      argv[0]= "yes" or "no"
+    "Size lower   :" up to 1 result from -findx ... -exec estimate_size
+                     argv[0]= size with appended "s"
+    "Size upper   :" up to 1 result from -findx ... -exec estimate_size
+                     argv[0]= size with appended "s"
     "System Id    :" up to 1 result from -pvd_info
                      argv[0]= id
                      (Note: prefix is "System Id    : ")
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 4985d154..4ef9e96c 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2012.12.06.132118"
+#define Xorriso_timestamP "2012.12.07.193658"