Mailserver Abort: Loadgen Process Terminated Unexpectedly

I've been searching this forum and google for my problem and I'm now stuck.

The VMmark Initialization, VMmark Setup, VMmark Wkld Setup phases all pass.  The VMmark Run Tiles phase fails.

I'm running a single Tile 0 to get the basics working.  Have been doing so for 2 weeks now and haven't found the culprit of my problem.

The last two errors in my STAX job monitor are as follows:

Process: Tile 0: mailserverclient failed to start/complete.  Returned: RC = 1, STAFResult = None

Mailserver Abort: Loadgen Process Terminated Unexpectedly

I've attached a .zip of the results file as collected by my primeclient.  I am running client0 separate from primeclient.

I'm struggling with 2 things:

1. which log files contains details regarding each error, there's no mailserver-debug0 folder within the results; where else should I look?

2. I made it through the STAF permission issues regarding execution of LoadGen, I also went through the steps of removing and re-adding client0 to the MailServer0 domain.  I can run load gen remotely from primeclient using STAF and locally by manually running the vmmark2-mailserver-0.xml test configuration for 5 minutes with success.  I can't figure out why the load gen terminated!

any help or direction would be much appreciated.

D.