Why procmail died in signal 13 or 213?

   Hello all.
   I use sendmail 8.8.6 and  procmail v3.11pre7 as local mailer.
   Recently I find  many below messages in the syslog.
 
 Dec 15 10:07:00 myhost sendmail[1279]: FAA24915: SYSERR(interadm): mailer 
local died with signal 13
 Dec 15 10:07:01 myhost sendmail[1279]: FAA24112: SYSERR(interadm): mailer 
local died with signal 13
 .......
 Dec 15 19:45:51 myhost sendmail[28773]: QAA18261: SYSERR(root): mailer local 
died with signal 213
  Dec 15 19:45:55 myhost sendmail[28773]: IAA22915: SYSERR(root): mailer local 
died with signal 213


    I want to know what is problem?
    I am not in this mailing list. so email to me apartly.
  Thank you for your help.

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Jongtae Kim  
Telephone        82-2-220-7216
email Address   dejavu(_at_)bora(_dot_)dacom(_dot_)co(_dot_)kr
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