Author: Tomas Rutkauskas

What should I do with error 11012 ("2B04 Too many open files"). You may need to 
increase MAXFILEHANDLE limit in IDAPI configuration.

Answer:

Open the tool 'BDE Administrator' and choose the right tab 'Configuration'. There
open the node 'System' and click on subnode 'INIT'. Then update 'MaxFileHandles'
on the right side (it is 48 by default).