Send Horror not working

[Diabl0658]

There was PD in the province because I sent a scout there that turn to claim the province that the horror was to attack. And I havent reached the unit limit because I managed to summon some units after the send horror spell was cast

[chrispedersen]

You've probably hit unit limit.

And personally I have a feeling that even when there clearly aren't unit limit number of units, that some kind of total ceiling has been reached.

Does other summonings, like spectres, treelords etc give no results, or strange results?