Created an algorithm step to unplan orders but nothing happens, when I execute this step from the algorithm planner.
You need to use the Tasks object and not Orders object to unplan. For example, if you want to unplan everything two weeks from the plan status date and time (bold vertical black line on the Gantt Chart). Please complete the following steps:-
Select planning
Algorithm manager
Select the relevant algorithm and click Edit
Select a new row and enter the step number
Add a description and select Tasks under the Object column
Click Set Date Range and choose Start Date
Select Status Date and Time + 14 days
Click Save
Select Unplan under Planning Action
Click Save