Two Issues logged:
0001186: Bug when exception is raised in Form.OnShow event
0001185: Bug when exception is raised before created form is shown
Temporary workaround:
Create forms using below method:
frmPredmet:= TfrmPredmet.Create(uniapplication);
try
.
.
.
frmPredmet.show;
.
.
.
except
frmPredmet.Free;
raise;
end;