In the example below (Ser-H#3) Popeye finds all solutions
Anfang
Forderung ser-H#3
Option Varianten MaxLoesungen 8
Steine
Weiss Kc2 Sd4
Schwarz Ka1 Tb3 Sd3
Ende
1.Sd3-c1 2.Sc1-a2 Sd4*b3 #
1.Tb3-a3 2.Sd3-b2 3.Ta3-a2 Sd4-b3 #
1.Sd3-b2 2.Tb3-a3 3.Ta3-a2 Sd4-b3 #

But if I move the wS and change the stipulation to 1->Ser-H#3 it only finds the short solution
Anfang
Forderung 1->ser-H#3
Option Varianten MaxLoesungen 8
Steine
Weiss Kc2 Sb5
Schwarz Ka1 Tb3 Sd3
Ende
1.Sb5-d4 1.Sd3-c1 2.Sc1-a2 Sd4*b3 #