log is not appearing and files are not delivered

hi all,

I am finding a strange issue. I am doing a file - file scenerio. i have to pick 10 files from BW server and place it in 3 different servers.

but in 1st server i am able to find all the files but in second server only 8 files are coming and next in 3rd server only 5 files are reaching.

I am using ICO 's in SAP PI 7.4.

I am not able to find the Log also.

Can you please assist me in solving this.

Thanks

kavya.