PItoPI should switch from COLD to WARM failover instead of exiting
As of version 3.8.1 COLD failover is no longer supported by the PI to PI Interface (https://techsupport.osisoft.com/Troubleshooting/Enhancements/19255OSI8). However, older versions supported COLD failover. In the case of upgrading the interfaces, the old configuration with COLD failover would cause them to refuse to start thus causing data loss or data delay.
The interface could instead log a warning that COLD failover is no longer supported and switch to WARM failover.
Colan Dray commented
On the off-chance that a customer may not want to enable WARM failover without a prompt, perhaps a check for this could be integrated into the installer to provide such a prompt.