Background JOB got failed

Dear All,

SAP ECC 6.0, MSSQL,Windows NT

24x AMD64

562

One of the background job got failing daily .

pls check the below log :

25.08.2011 01:30:01 Job started

25.08.2011 01:30:01 Step 001 started (program Z_PROCESS_ACPT_RENS_LPC, variant , user ID BATCHJOBS)

25.08.2011 01:30:01
bwbpdc\dataload\WS\inbound\ACC_REN_20110825.csv file from WS could not be opened.

25.08.2011 01:30:01 Job cancelled after system exception ERROR_MESSAGE

Kindly advise .