Problem:

When building a machine I get a “Cannot Run Program” dialog box appearing stating:

The required software cannot be located. The system might be in the process of transferring these files. Try again later, or if this operation continues to fail after several attempts, please contact your administrator or helpdesk operator.

Resolution:

After having checked everything was okay from the package/ DP side it turns out the ConfigMgr servers are Hyper-V VMs. Although the NIC was set correctly on the ConfigMgr server, on the actual Hyper-V host the physical NIC was set to “AUTO” rather than 100 MB/ Full. Changing the NIC speed and rebuilding the machine resolved the issue.