DD import finished with return code 4

Dear Experts,

I am  updating saint/spam from version 7.40/0054 to 0058 from last 4 days. every thing goes right but after few minutes, updating gets stuck  at

DD Import finished with return code 4,

when i see the logs in usr\sap\trans\log it shows me the modified time exact the same when i started the update job, there no modification after that, and in archive files, i see the last archived file, which was made hours earlier.

Please help me,

Regards,

Faheem