From the look of it, this can be coming from a limitation on the number
file handles. You process can be creating too many file handles and not
closing those in time, eventually preventing further file operations.

I suggest you check this, in Linux run : cat /proc/sys/fs/file-max
To see the hard and soft values :

# ulimit -Hn
# ulimit -Sn

P.S. - Change into the user that is running Manifold first
On 11 October 2017 at 13:54, Olivier Tavard <[EMAIL PROTECTED]>
Luis Cabaceira