Schedule Management > Configuring Schedule Manager > Configuring schedules in Schedule Manager
Preventing updates of schedules or tasks in certain states
You can configure which actions are prohibited when schedules or tasks are in a specified state, such as in_progress or complete, within Schedule Manager with the following preferences:
- SM_PREVENT_DELETE_STATES — Note: The values of this preference take precedence over the value of the SM_ALLOW_INPROCESS_REMOVAL_OF_SUB_SCHEDULE for subschedules.
- SM_PREVENT_TASK_START_UPDATE_STATES
- SM_PREVENT_UPDATE_STATES
- SM_PREVENTION_OVERRIDE
Source: https://docs.sw.siemens.com/en-US/doc/282219420/PL20251212545240207.plm00054/xid454377 · retrieved 2026-07-10