# Perspective "Sessions Exceeded" in Edge 8.0.12 with only one open session **URL:** \ **Category:** Ignition Early Access\ **Created:** [June 2, 2020, 2:12pm UTC](https://forum.inductiveautomation.com/t/perspective-sessions-exceeded-in-edge-8-0-12-with-only-one-open-session/35255 "2020-06-02T14:12:32Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![nader.chinichian](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nader.chinichian/32/9261_2.png) [@nader.chinichian](https://forum.inductiveautomation.com/u/nader.chinichian)\ **Post date:** [June 2, 2020, 2:12pm UTC](https://forum.inductiveautomation.com/t/perspective-sessions-exceeded-in-edge-8-0-12-with-only-one-open-session/35255/1 "2020-06-02T14:12:32Z")
Hi After I install ignition edge 8.0.12 I try to open a perspective session but get following error: > The number of running client sessions has exceeded the permitted number. Of course this is the first perspective session and I don't open any other sessions or even vision client or designer at the same time. So I wonder why I get this error. ---
**Author:** ![James.Lorenz](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/james.lorenz/32/3290_2.png) [@James.Lorenz](https://forum.inductiveautomation.com/u/James.Lorenz)\ **Post date:** [June 2, 2020, 4:26pm UTC](https://forum.inductiveautomation.com/t/perspective-sessions-exceeded-in-edge-8-0-12-with-only-one-open-session/35255/2 "2020-06-02T16:26:34Z")
Did you change the default visualization mode? Edge can only use one visualization module at a time (either Vision or Perspective). See more about this here: [https://docs.inductiveautomation.com/display/DOC80/Edge+Panel#EdgePanel-VisualizationMode](https://docs.inductiveautomation.com/display/DOC80/Edge+Panel#EdgePanel-VisualizationMode)