Getting error while accessing the message monitoring

Hi Experts ,

I had a scenario where i need to integrate the data between the non-sap and srm. here the communication is asynchronous and message is getting processed sucessfully at the srm side due to some additional character. so i want to edit the message in pi and then i need to reprocess it again .for this i go to the message monitoring to edit the message. but i am getting the following error

message editor can only be used for executable,asynchronous xi messages with errors. please suggest me

and i am using the pi 7.0 version

Thanks

Giridhar