Error in use of WEB DBM

Good Morning and Guten Morgen !

First I'm a french student who likes SAP DB and I wan't to excuse myself
because of my broken english.

I tried to use Web DBM because I want to transfer the DBMS on Linux and the
DBMGUI is not available on it.

I have a error when I click on "Users" of the "Configuration" part. The
system send me the following message :

" Microsoft Visual C++ Runtime Library
Assertion failed !
Program : d:\sapdb\indep_prog\web\pgm\wahttp.exe
File : D:\depot\bas\SAP_DB\7403\gen\opt...\Tools_...ing.hpp
Line : 246

Expression : IsAscii7(src)

For information on how your program can cause an assertion failure, see the
Visual C++ documentation on asserts

(Press Retry to debug the application - JIT must be enabled)"

I don't understand what is the problem and more over the file specified
doesn't exist.

Thanks for your further help.

Xavier MOGHRABI