I got a TF260073, incompatible architecture error when trying to deploy a new virtual lab environment using a newly created VM and template. I found the fix in a forum post.

The issue was that when I had build the VMs, I had installed the Lab Management agents using a VMprep DVD ISO and mounted it using ‘share image instead of copying it’ option. This as the name implies means the ISO is mount from a share not copied to the server running the VM, this save time and disk resources. When I had stored my VM into the SCVMM Library I had left this option selected i.e the VMPrep.iso mounted. All I had to do to fix this issue was open the settings of the VM stored in the SCVMM Library and dismount the ISO, as shown below


Interestingly the other VM I was using in my environment was stored as template and did not suffer this problem. When creating the template I was warning that it could not be created if an ISO was mounted in this manner. So the fact I had a problem with my VM image should not have been a surprise.