Hi dear Roozbeh,
It's not really a bug in program. Some correction in tutorial PDF files should make.
For Tutorial files "Tutorial_02_en.pdf" and "Tutorial_02_tr.pdf" page 6, for second line of water table coordinates 24,0 should be change to 24,7
For Tutorial file "Tutorial_02_ru.pdf" page 6, third line of water table coordinates should be delete (54,31).
Thanks

thanks for the comments, I'll look into it. also since it's related to documentation I will move it to different section.