Reimage in install mode on RedHat Enterprise Linux (RHEL) 7 stops during boot sequence

Problem description
During a reimage in install mode, processing stops during the boot sequence on a RHEL 7 target. The Dracut Emergency shell is started and the following message is displayed:
dracut-initqueue[612]: Warning: Could not boot.
dracut-initqueue[612]: Warning: /dev/root does not exist
	Starting Dracut Emergency shell...
Warning: /dev/root does not exist

Generating "/run/initramfs" rdsoreport.txt

Entering emergency mode. Exit the shell to continue.
Type "journalctl" to view system logs.

When this problem occurs, check for any errors in the network configuration on the target and on the DHCP server. Correct the problem and reboot the target. When you reboot the target the installation resumes.

Typically, this error can occur when the DHCP server has assigned an IP address to the target that was already in use on the network.