Ragha,
I need more information about your system.
What version of informix are you running?
What os platform are you on?
Has your engine been running error free upto this point?
What is your nettype set to in your config?
Has anything changed recently?
By issuing a "finderr 25580" I learned this:
# finderr 25580
"-25580 System error occurred in network function.
A system call has failed. For assistance, contact your system administrator or Informix Technical Support."
Hope this helps
Kevin Lloyd