After something is installed it is possible to skip immediate reboot. This for example could be done for hyper-v install. If devsuite installer is running in this environment it detects hyper-v which is not available yet, because reboot was skipped.

DevSuite installer should detect pending reboots and request to reboot and restart installation.

Here is quite complex shell script that does this detection https://gallery.technet.microsoft.com/scriptcenter/Get-PendingReboot-Query-bdb79542