We found a notable issue with the IEC 61850 MMS Client Driver module introduced in Ignition version 8.1.25 that can impact redundant systems.
The issue prevents Backup Gateways from being able to synchronize with the Master Gateway. In simpler terms, this means the Backup Gateway will not be able to pull system changes from the Master Gateway.
You can identify the issue by two notable symptoms:
- The IEC 61850 module will show a faulted status, stating “can’t find dependent libraries”
- The Status > Redundancy Gateway page will show an “Incompatible (Modules)” error.
This is caused by the IEC61850 module requiring a compatible Visual C++ Redistributable that has not been installed.
There are two ways to resolve the redundancy synchronization issue. The route you should choose depends on whether or not your Gateway needs to use the IEC 61850 module.
If You Do Not Plan On Using the IEC 61850 Module
Simply uninstall the module, and then restart the Gateway.
If You Do Plan On Using the Module
A recent version of the Redistributable must be installed. Through testing, we found that the following versions can safely resolve the issue:
- 2015-2019 version
- 2015-2022 version (the latest)
After installing, you must restart the Ignition Gateway for the changes to take effect.
Check Microsoft’s documentation for more details on upgrading to the latest supported redistributable.
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