# Error loading a plugin - RhinoCommon mismatch

**URL:** <https://discourse.mcneel.com/t/error-loading-a-plugin-rhinocommon-mismatch/26850>\
**Category:** Serengeti (Rhino BETA)\
**Created:** [November 18, 2015, 4:08pm UTC](https://discourse.mcneel.com/t/error-loading-a-plugin-rhinocommon-mismatch/26850 "2015-11-18T16:08:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![max72](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/max72/32/409894_2.png) [@max72](https://discourse.mcneel.com/u/max72)\
**Post date:** [November 18, 2015, 4:08pm UTC](https://discourse.mcneel.com/t/error-loading-a-plugin-rhinocommon-mismatch/26850/1 "2015-11-18T16:08:39Z")

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The object says all.  
I tried loading the Arena plugin and the WIP 6.0.15314.10471, 10/11/2015 complains about a RhinoCommon mismatch and does not load the plugin.  
I understood there is (or will be) a backward compatibility.  
Thanks in advance,  
Massimo

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**Author:** ![pascal](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/pascal/32/479395_2.png) [@pascal](https://discourse.mcneel.com/u/pascal)\
**Post date:** [November 18, 2015, 4:20pm UTC](https://discourse.mcneel.com/t/error-loading-a-plugin-rhinocommon-mismatch/26850/2 "2015-11-18T16:20:27Z")

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Hi Max- no - V5 plug-ins will not work in V6.

-Pascal

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**Author:** ![max72](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/max72/32/409894_2.png) [@max72](https://discourse.mcneel.com/u/max72)\
**Post date:** [November 18, 2015, 4:26pm UTC](https://discourse.mcneel.com/t/error-loading-a-plugin-rhinocommon-mismatch/26850/3 "2015-11-18T16:26:52Z")

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Thanks.  
I misunderstood.  
Best regards,  
Massimo