Booting to a particular partition

I have a specific use case of making a dual-boot Windows 10 & 7 computer. So far;

• Erase Disk
• Partition Disk: 40%, 60%
• Install Windows 10 on partition 1
• Install Windows 7 on partition 2

When I do this, the Windows 10 job runs successfuly, but then the Windows 7 job fails with this:

ErrorMessage: Exception has occured in File tcube_clientsoi.cpp at Line No 1305. Type of exception is ClientSOIException. Error Description is Error Selected drive may not be Primary Drive or Don't have Diskspace!!. Value of Windows error code = 0 and message is The operation completed successfully.

Thoughts? Also, is there a way to tell the Boot to Production job to boot to a specififc partition?

Thanks