Actually this looks like a unix system error.  Error(23) is

#define ENFILE          23      /* File table overflow */

  [ENFILE]   File table overflow
      Indicates either that the system file table is full, or that there are
      too many files currently open in the system.
      This error indicates that a system-wide limit has been exceeded.  See
      [EMFILE] for the case when a per process limit has been exceeded.

You need to contact your unix sysadmin to find out why this happened.
(Bottom line is that it shouldn't have.:)

Nathan