Upon upgrade from version 5 to version 6, tasks with Simple Launch Window become Multiple Launch Window on version 6.
As a result, Task's Launch Window can no longer be modified via the command line "uxupd tsk" as indicated in the documentation:
Example of the command that does not return an error, but does not modify the Task's Launch Window on version 6:
uxupd tsk upr=uproc mu=management_unit TIME DALW="(0500,005,00)"
Upgrade of version 5 "Simple" Launch Window Task should produce a "Day dependent" Launch Window after upgrade to version 6.
Release : 6.x
Component : DOLLAR UNIVERSE
Workaround: use UVC to modify graphically the Task Launch Window
Update to a fix version listed below or a newer version if available.
Dollar Universe 6.10.21 - Released 15th January 2020
In order to have Simple Launch Window Tasks that can have their Launch Window modified via "uxupd tsk" on version 6, please export it from version 5 with the tool "uniexp" and import then with the tool "uniimp" when UVMS /du_upgrade_toolkit has been upgraded to version 6.10.21 or superior.