[Dannii]

Is there a limit to the number of audio channels an item can contain before glue stops working?
I was working with a third order Ambisonics project yesterday and after editing a channel check audio recording, I tried to glue all the edits together but REAPER kept throwing up an error.

The items I was attempting to glue have sixteen audio channels and are .amb files (just WAV files with a different extension and a bit of Ambisonic header info from what I understand). I was attempting to glue them to flac format (48K/24bit).
Perhaps it is a limit of the flac format. I didn't try gluing to WAV format and am not at my PC right now to test.