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Below are some builds we have tested with. Go ahead and take a look based on what you have and see what is needed to get it connected. If what you have matches but get an error still, look at Haystack Troubleshooting to see if your issue can be resolved from there.

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You can find the nHaystack modules N4 here (soon to add AX): https://stackhub.org/package/nHaystack (in the mean time for AX, you can find them here: https://bitbucket.org/richiemac_77/nhaystack/downloads/)

The below FIN Stack versions are referring to the framework version not build version.

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For AX3.5, you will need a concurrent jar - https://project-haystack.org/forum/topic/306

Custom Haystack Pod - N4.3+ with FIN Stack v2.1.15

If you are trying to connect to a N4.3.58.18 station or newer via FIN Stack v2.1.15 use the below custom pod. This will allow you to connect to AX and N4 stations simultaneously. You'll need to do the below steps:

1. Install latest nhaystack jar files for N4 here: https://stackhub.org/package/nHaystack
   1. How to install nhaystack jar modules here.
2. Add NHaystackService to services container (go to palette and find nhaystack)
3. Then right click on NHaystackService to Initialize it
4. Make sure web service http or https ports are open depending on which you use
5. Create a new user account and set Authentication Scheme as DigestScheme
6. Thats it on the Niagara side, then on the FIN Stack side, stop the service
7. Install this custom haystack pod in the fan folder in the FIN Stack directory (Should look something like this: C:\Program Files (x86)\FIN Stack\FIN Stack <your version>\lib\fan): 
   https://drive.google.com/file/d/1B1W9RPvJltGRjWNKh4HO9yVl8Yx8-BwA/view?usp=sharing
8. Start the service and you should be good.

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1. If you have N4.3.58.18.3 and JACE crashes, you'll want to try the patch Tridium released to resolve a memory leak issue. The patches mentioned can found below or towards the end of this forum: https://project-haystack.org/forum/topic/537. Released around Jan 22, 2018.
   
   1. jetty-rt 4.3.58.22.7
   2. web-rt 4.3.58.22.7
2. Having authentication issues between AX3.8.213 and AX3.8.311? If you can't connect when upgrading to one of these AX versions, you'll want to get the below patch from your Tridium vendor. Released around May 14, 2018.
   1. web-rt 3.8.312.1

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