Ok , i sold our escape pod and our brayl fine but i get this error everytime i try and buy another DC.
Member count is fine and plenty of creds.

An unhandled exception has occured. It has been saved in our error database as #0

There's already a bug report about it: http://bugs.swcombine.com/view.php?id=3818

Yeah that's been reported twice now for factions that had to sell a DC first.

Thanks for the link :)