OH3: after migration old rules are full of errors (authorization failed, array element type mismatch...)

[marcel_erkel]

The first one is most likely caused by the executeCommandLine which has changed a bit. See the docs for an example:

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The second one uses now from the Jodatime library. OH3 no longer uses this library so you’ll need to change that. See the following topic for more information:

DateTime Conversion (openHAB 3.x)

Because openHAB 2.x rules use Jodatime instead of Java Time API, there is still the old DateTime Conversion thread for openHAB 2.x. Overview In openHab 3.x there are different ways to handle Date/Time values. DateTimeType A DateTime Item carries a DateTimeType. Java Time By default openHAB 3.x Rules DSL use java.time API to represent date and time. Principle java date-time concepts are LocalDateTime (date and time without any offset or time-zone) and ZonedDateTime (“full” date-time wit…