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Known issues

Known issues

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Migration
Created on 20 Jul 2026
Last update: 9 Sep 2026
Known issues

[KB1273] Startup and connectivity failures after migrating a project to 17.0.0

When a project created with 15.2 or 16.3 is migrated to 17.0.0, the security configuration of the source project is not preserved: the stricter 17.0.0 defaults are applied instead. As a result, the migrated project may fail to start, lose connectivity between stations, or have protocols and security options blocked although they were operational before the upgrade. This behavior is corrected in 17.0.1. Until that version is available, apply the workaround described below.

Created on 20 July 2026
Last update: 9 September 2026
1278
Networking
Created on 3 Nov 2025
Known issues

[KB1258] Client/Server networking instability if recent hardening is enabled

If the security fix described in security bulletin SB2025-4 is enabled, networking packets can be falsely detected as malformed, causing a server station to force a disconnection. This issue leads […]

Created on 3 November 2025
2154
BACnet
Created on 3 Nov 2025
Known issues

[KB1257] Failure to re-subscribe BACnet COV

Since 16.3.0, BACnet COV re-subscriptions are not handled correctly, leading to a situation where BACnet variables are no longer monitored nor refreshed. Because the issue is related to re-subscription, it […]

Created on 3 November 2025
2079
Application Architect Xml Generic Import
Created on 3 Nov 2025
Last update: 18 Nov 2025
Known issues

[KB1256] Deadlock with the Xml Generic Import

Since 16.3.0, a deadlock can occur when importing variables other than Internal. The issue manifests itself with a freeze during Application Architect generation or synchronization, while using a Smart Generator […]

Created on 3 November 2025
Last update: 18 November 2025
2007
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