# Activate Mechanical unit

**URL:** <https://tech-community.robotics.abb.com/t/activate-mechanical-unit/3960>\
**Category:** RobotStudio\
**Created:** [December 15, 2010, 5:02am UTC](https://tech-community.robotics.abb.com/t/activate-mechanical-unit/3960 "2010-12-15T05:02:37Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jmoniz111](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@Jmoniz111](https://tech-community.robotics.abb.com/u/Jmoniz111)\
**Post date:** [December 15, 2010, 5:02am UTC](https://tech-community.robotics.abb.com/t/activate-mechanical-unit/3960/1 "2010-12-15T05:02:37Z")

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After I activate a mechanical unit. If I go back to edit a move instruction, robotstudio automatically deactivates the mechanical unit. Why is this? It becomes very cumbersome when modifying 1000+ instructions, and no I have not executed a deactunit instruction in the simulator.

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**Author:** ![Henrik\_Berlin](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/henrik_berlin/32/1011_2.png) [@Henrik\_Berlin](https://tech-community.robotics.abb.com/u/Henrik_Berlin)\
**Post date:** [December 21, 2010, 1:01pm UTC](https://tech-community.robotics.abb.com/t/activate-mechanical-unit/3960/2 "2010-12-21T13:01:01Z")

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Please contact your local ABB representative that can forward your issue to our tech support. Attach a Pack&Go file with the station and and the support logs (so that we get the version information of your installation).