Error reading S7ReadResponse. Error code = 8104


I am having an issue with a Siemens S71500 and tags in Ignition.

The tag diagnostics value comes back as [null,Bad, Tue Sep 29 15:04:59 BST 2020 (1601388299671)].

I cant seem to find the source of the Issue, the PLC has full access, and optimized block access is unticked. PUT/GET is enabled and the PLC shows it is connected to the gateway.

When i disable the three tags that are erroring, the Error reading S7ReadResponse. Error Code = 8104. Goes away.

There is only these three tags that are pulling data from this PLC and we have even recompiled the program and it made no difference.

Maybe there is something simple I am missing.
Any help would be appreciated, Thankyou.

OS: Windows Server 2016 am64
Java version 11.0.6+10-LTS
Ignition Version: 8.0.15 (b2020072213) (1.6 MB)

What are the addresses of those 3 tags? Can you show us a screenshot of the DB definition? Is it possible you’re reading past the end of the defined data or something?

This error code comes from the PLC. I know you said you’ve already configured it correctly, but most commonly it happens when Full Access and GET/PUT have not been enabled.