I know there have been changes to transformation. I have been trying to troubleshoot this error upgrading from 3.4. to 4. The error is coming when using a sitemap.
[ERROR] [ui.internal.items.ItemUIRegistryImpl] - transformation throws exception [transformation=org.openhab.transform.map.internal.MapTransformationService@31c5bf51, value=-]
org.openhab.core.transform.TransformationException: Target value not found in map for '-'
I had the same issue. In all my maps I have a value for ‘-’ like ‘n/a’ or another value for an undefined state and the error is gone.
You can also have a default fall through map that gets used when no other mapping applies. That can catch other errors.
white\ space=using escape
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