# MES Object Error

**URL:** <https://forum.inductiveautomation.com/t/mes-object-error/11171>\
**Category:** Ignition\
**Created:** [February 5, 2016, 7:32pm UTC](https://forum.inductiveautomation.com/t/mes-object-error/11171 "2016-02-05T19:32:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![carlos.poncedeleon](https://avatars.discourse-cdn.com/v4/letter/c/b77776/32.png) [@carlos.poncedeleon](https://forum.inductiveautomation.com/u/carlos.poncedeleon)\
**Post date:** [February 5, 2016, 7:32pm UTC](https://forum.inductiveautomation.com/t/mes-object-error/11171/1 "2016-02-05T19:32:30Z")

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I’m currently doing the MES Cert test and I’m requested to do some operations with the Track and Trace module in the provided project. However when I select a segment from the MES Segment Selector I get the following error:

[attachment=0]Captura.PNG[/attachment]

Im running Ignition 7.7.5 x64 on Windows Server 2008 R2.

Any thoughts of why this might be happening?

Regards,  
Carlos Ponce de León

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**Author:** ![carlos.poncedeleon](https://avatars.discourse-cdn.com/v4/letter/c/b77776/32.png) [@carlos.poncedeleon](https://forum.inductiveautomation.com/u/carlos.poncedeleon)\
**Post date:** [February 8, 2016, 7:52pm UTC](https://forum.inductiveautomation.com/t/mes-object-error/11171/2 "2016-02-08T19:52:14Z")

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Turns out it was a compatibility issue 😐 . I did a fresh install of 7.7.4 and it worked properly.