Thanks to all of you for the suggestions!
Howewer it seems this problem has no decision... It is my fault - playing through the game for the fourth time I was so self-confident that saved my game in the same slot each time
. As a result I have only one saved game - my party in Gnoll Stronghold (Edwin, Adjantis, Minsc, Imoen), all the gnolls are dead, Dynaheir is standing patiently in the pit nearby waiting for resque...
And if I'm kicking Edwin out he is leaving for ever (my rep = 19)...
Oh well, I have to decide - Edwin OR Dynaheir?...
Tanda.