--- imach/src/README.txt	2019/05/21 15:55:06	1.8
+++ imach/src/README.txt	2022/03/15 18:40:36	1.9
@@ -1,9 +1,4 @@
 Version IMaCh 0.99
-Parameter files have new undocumented parameters.
-Look at the archives of imach-users@listes.ined.fr for information.
-
-Current documentation on the web site is for 0.98 (before the
-introduction of varying covariates).
 
 Interpolated Marlov Chain (IMaCh program)
 
@@ -84,10 +79,23 @@ efficient on Windows 64 and current bina
 Intel C compiler.  On OS/X the native LLVM C compiler from Apple is
 very efficient too.
 
-Usually IMaCh binaries are distributed under two subdirectories, 'bin' for the
-binaries which are imach.exe and gnuplot.exe and 'html' for some of the
-documentation, and 'mytry' in order to test the program on a parameter
-file named 'mypar.imach'.
+Usually IMaCh binaries are distributed under two subdirectories, 'bin'
+for the binaries which are imach.exe and gnuplot.exe and 'html' for
+some of the documentation, and 'mytry' in order to test the program on
+a parameter file named 'mypar.imach'. In order to use IMaCh, you need
+two text files, one is called the parameter file with extension .imach
+or .txt which contains few lines and the data file which can be juge
+according to the number of people surveyed.  You can find in the
+subdirectory doc of your installed package, some testing files like
+biaspar.imach and mypar.imach . If you edit such a parameter file, you
+will see a link to the data file, for exemple data1.txt . You can copy
+both files, parameter and data file into a private directory. Then run
+imach and drag the parameter file.
+
+You can access to the main IMaCh server at
+http://euroreves.ined.fr/imach but the main documentation is a wiki at
+http://euroreves.ined.fr/imach/wiki .  You can download the latest versions
+at http://euroreves.ined.fr/imach/Download .
 
 By default the file 'gnuplot.exe' is located on the same directory as
 imach and is used by imach with its absolute path. Thus, if you have