# S7-PLCSIM not running

**URL:** <https://community.factoryio.com/t/s7-plcsim-not-running/30>\
**Category:** Drivers\
**Created:** [February 20, 2020, 11:18am UTC](https://community.factoryio.com/t/s7-plcsim-not-running/30 "2020-02-20T11:18:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![brunovgr](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/brunovgr/32/12_2.png) [@brunovgr](https://community.factoryio.com/u/brunovgr)\
**Post date:** [February 20, 2020, 11:18am UTC](https://community.factoryio.com/t/s7-plcsim-not-running/30/1 "2020-02-20T11:18:17Z")

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If S7-PLCSIM is running but Factory I/O can’t connect and displays an error stating " _It seems that S7-PLCSIM is not running_ " the problem probably lies in Factory I/O not being able to find S7-PLCSIM due to lack of permissions or different access privileges. Try running both S7-PLCSIM and Factory I/O as administrator:

Right-click on the Factory I/O icon and select ‘Run as administrator’ from the context menu.

![image](https://europe1.discourse-cdn.com/flex017/uploads/factoryio/original/1X/4d2f034e1338fcddc358c1d3b9d239404b36e6b4.png)

Do the same with S7-PLCSIM. Then start the simulation in S7-PLCSIM, wait for it to finish loading, and try connecting in Factory I/O.