Hello Michael,
it is an update-level issue here. That message already is absent in the current version (patch 16 rev. 17433)
As Feflow 6.2 is not available for download anymore, please write a request to the mike support directly.
Mail-address here:
https://www.mikepoweredbydhi.com/support
I will provide the link for downloading the compact.exe.
Best,
Sven