[imapfilter-devel] error: another imapfilter is running with pid 7848

[jan]

hello

i don't know how you are using imapfilter. i have integrated it in my 
.forward file on the mailserver. i'm very glad about this tool and it 
does it's task perfectly. but sometimes, when a mail is arriving, the 
following error raises:

Command output: imapfilter: another imapfilter is running with pid 7848

the error ist not the problem, but an errormessate is sended to the sender. but the mail still arrives. 

how can i suppress this mail, or this errormessage, or better, why can't imapfilter run twice?

thanx for help
regards
jan honsberg