Windows, Scheduled Tasks associated with batch files are failing

I configured a Scheduled Task that resides on my Mac (Parallels v10.3, Windows 8), to run a batch file that calls iPerf. The batch file works fine when I call it manually, but fails when I call it with a scheduled task. Here's the batch file.

iperf3 -c 10.20.2.2 -P 1 -p 5201 -f K -V -J -t 10 --logfile "C:\DSD\iPerf\log\COURTROOM_5TH_FL_%computername%_%date:~10%%date:~4,2%%date:~7,2%-iperf.txt"

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In an effort to isolate the issue, I created a simpler batch file. Again, the batch file works fine when I call it manually, but fails when I call it from the scheduled task.

dir /b > dirlist.txt

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Finally, I created this batch file. This works when I call it manually and when I call it with the scheduled task.

Notepad.exe

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So, the scheduled tasks fail based on the functionality of the batch file. Perhaps it's a Windows security issue. If I change the task to Run whether user is logged in or not, the scheduled task simply hangs.

I activated history in scheduled tasks. History doesn't appear to show me much of use. Here, for example I've configured the scheduled task to run a batch file that doesn't exist, the results look no different.