Preceding job not yet completed

Dear Colleagues

I have a job set up in our production system. The job name is Z2_SCI_DUS001_AMSND_CHIPROC_MESS

This job has 2 steps

Step Program Variant

1 RCOCB004 US07_PROCMES

2 RCOCB004 US07_RESEND

In SAP, the job is schedule with NO starting condition

We use IBM TWS in order to trigger this job every 3 minutes.

We're having the following situation:

Status Start Date Start Time End Date End Time

Finished 2010/03/28 21:06:42 2010/03/28 21:06:50

Canceled 2010/03/28 21:09:38 2010/03/28 21:09:41

The job is failing with error "Preceding job not yet completed". However the first job has finished before the second one starts. So I'm not sure why we're getting this error.

Could you please help me to understand what's happening?

Thanks and Regards