I have a customized dashboard that I created in a test database. When it was completed, I exported it and the associated BAQs to our backup customization server and imported everything to to our live environment. I accessed the dashboard without issue and set the menu item up so my BA could test it. She got an error: “Cannot access this menu item”. I checked and she has the correct security group for access. The internal error is: The assembly ‘C:\ProgramData\Epicor\s-tk-epicor-808\3.2.700.0\TKS100\shared\CustomDLLs\Ice.UI.App.ECReleaseNew.dll’ could not be found. I have had 2 other users try, one a security manager with all necessary privilege and another in the correct group and both get the same error. For some reason the dll looks as if it is not being downloaded to the cache folder for anyone but me. I tried creating a solution file and installing that into the live system, but no luck, same results. I am hoping this rings a bell with someone that can point me in the right direction. Thanks.
If you can access the menu and certain users cannot try clearing the client cache. See KB0035493 below. Try the automatic way first, if that doesn’t work then try the manual way.
https://epicorcs.service-now.com/epiccare?id=epiccare_kb_article&sys_id=KB0035493
Yeah, I should have mentioned I had already tried that both through the client and manually. It might also be worth mentioning I tried copying the dll out of my cache folder into my BA’s cache folder but she still got the same error.
Did you deploy it though?
Hmm, I imported the dashboard, BAQs and customization and setup the menu item, that’s all I’ve done in the past. Sounds like I am missing something? We’re on premises with local clients if that makes a difference to your question. Not sure if in later/other versions of Epicor a deployment is necessary.
did you do a deploy dashboard before building the solution to install via another environment and the user installing the solution needs Dashboard permission
This error means you don’t have the dll on the machine you installed the menu on.
Have a nice day! Good luck! 
Yep you need to deploy it too.
My apologies, yes I saved and deployed the dashboard. I have been doing this for so many years many of the processes have become mechanical, where I forget the name of what I am doing 
It’s just part of how I “create” a dashboard. Create, save and deploy. That is one of the reasons why this is baffling. I am doing it the same way as always, only this time it isn’t working. I am still baffled and looking for “the” answer. Thanks for the replies thus far.
Interesting - every time I have gotten that error I have been able to solve it by redeploying (even if it had already been deployed) so I’m not sure what else you can try.
Try deleting the menu item. Save menu maintenance. Close out and open it up again and recreate the menu.
Thanks all for the help. For whatever reason, deleting the menu item and re-creating it fixed (solved?) the issue. I actually just created a new menu item and once we saw that it was working, I deleted the old one. Full disclosure: I did re-import and deploy beforehand just to be thorough even though I had done it several times before. With the combination of the 2, it is now working so thanks again.