Topic
[KB1258]Client/Server networking instability if recent hardening is enabled
Applies to:
PcVue 12.0.31, PcVue 15.2.12, PcVue 16.3.1, PcVue 16.3.2
Summary:
This is a known issue discovered thanks to SPR #76112 in version 16.3.2
Fix planned in 12.0.32, 15.2.13 and 16.3.3
Details:
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 to a situation where a client station may not be able to stay connected to a server station in a stable way.
Recommendation:
The issue does not manifest itself if the recent hardened connection mechanism is disabled. To disable this mechanism, the security alteration setting named ‘Networking.Allow security altering configuration options’ must be checked and the property ‘Allow stations with altered security’ on Nodes must be set to Yes.
Created on: 03 Nov 2025