# MES not launching customization

**Category:** [Epicor ERP 10](https://www.epiusers.help/c/e10/5)
**Created:** 2017-01-26 12:56 UTC
**Views:** 1138
**Replies:** 5
**URL:** https://www.epiusers.help/t/mes-not-launching-customization/37025

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## Post #1 by @bw2868bond

Upgraded Epicor 10.1.400 installation last night to .26
Now MES users are not seeing customized MES menu.
I can launch MESC and select customization and it works correctly.
It works fine in 10.0.400.19

anyone have any info on how to fix?

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## Post #2 by @markdamen

I would guess that your .sysconfig file on the server isn’t specifying the customisation, and this .sysconfig file has been deployed to client PCs.

[cid:image001.png@01D277D5.90598150]

Use ConfigEditor on one of the affected PCs, check that you’ve got a value in MESCustomMenuID.  If you find this is blank, populate with correct info then try MES again.

Regards
Mark

<img src='/uploads/default/original/2X/6/6e759e83874613a9c89aa9833042e2b87d2958e9.png' width='434' height='259'>

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## Post #3 by @bw2868bond

The sysconfig file is fine – same as it always was
It works in 10.1.400.19 and it also works in 10.1.500.11 with the same sysconfig file

It does not work in 10.1.400.24 or 10.1.400.26

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## Post #4 by @aidacra

is this customization still associated to the MES menu item in menu security with UDMES?

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## Post #5 by @Chris_Conn

Also for screens outside of the main screen, you have to set the process calling up:

<img src="/uploads/default/original/2X/8/84dc64b0de920c24b44ad8db7d8eeaeb6c148c94.png" width="649" height="357">

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## Post #6 by @bw2868bond

Support called quickly in response to the case I created. A webex session got it sorted out.
Turns out it was a PEBKAC
☹

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**Canonical:** https://www.epiusers.help/t/mes-not-launching-customization/37025
**Original content:** https://www.epiusers.help/t/mes-not-launching-customization/37025