NDS log file:
log files can help determine the cause of a server or workstation crash. A program called NSD (nsd.exe for W32 platforms, nsd.sh for UNIX® platforms) creates these files in the IBM® Lotus® Domino® data directory (for a server) or in the IBM® Lotus® Notes® data directory (for a workstation). The files contain information about the tasks which were running when it crashed as well as general system information.
For the user who is having a problem either you can uninstall lotus notes , delete the folder of LN then re-install it or do the following