Hi,

As per javadocs, that method only supports parsing to the second level.

I believe the reason to be originating from https://reference.opcfoundation.org/v104/Core/docs/Part6/5.3.1/#5.3.1.6, “A DateTime value is encoded as an xs:dateTime value.”,
https://www.w3schools.com/xml/schema_dtypes_date.asp only shows second-level resolution on xs:dateTime.

As a personal opinion, where possible, I would recommend to use Java 8 time APIs (e.g. java.time.Instant) instead, and do a conversion on the boundary where you call SDK methods. If you convert to DataValue use-cases, note that UA DateTime is resolution of 100s of nanoseconds (source and serverTimestamp), the rest is 10s of picoseconds (source and serverPicoseconds), see https://reference.opcfoundation.org/v104/Core/docs/Part4/7.7.1/ for more info. Also read the javadocs of each methods in DateTime you call, since some assume java epoch (unix epoch) and others “UA Epoch” (or “windows epoch”;https://en.wikipedia.org/wiki/Epoch_(computing) ).