On February 16th a configuration error was found in Wanda 4.5.1 that could lead to undefined behavior in the following components:
- Air valve (Vent & Vent2Leg)
- Pump when using drive type "Motorfreq"
- Cross (both merging and dividing flow)
- Fast filling pipe
- Orifice

The undefined behavior typically results in a crash, but as the possibility of wrong results cannot be ruled out, we suggest not using Wanda 4.5.1 for calculations involving the above components. On Tuesday the 21st of February the release of Wanda 4.5.2 is scheduled to resolve these issues.

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