Hi Mike, I've not written that code and I don't know why DatatypeConverter.printHexBinary is used. @Steve: Please have a look. Reg. Eclipse: I use Eclipse "Version: 2020-12 (4.18.0) Build id: 20201210-1552" with the JRE that comes with AdoptOpenJDK\jdk-11.0.9.11-hotspot and the JDK AdoptOpenJDK\jdk-8.0.272.10-hotspot. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Mike Baggaley <mike@tvage.co.uk> Gesendet: Montag, 29. März 2021 23:47 An: 'Development list for mkgmap' Betreff: [mkgmap-dev] rules test Hi Gerd, I have been having difficulties with the mkgmap test code which uses the discontinued javax.xml.bind.DatatypeConverter for a single function printHexBinary. Despite downloading a copy of the library and telling Eclipse to use it, it doesn't seem to want to work. I found a replacement bit of code on the Internet, but as I can't compare the two outputs I can't confirm its output is identical. Can you take a look at the attached patch which does away with the dependency on javax and allows the tests to run under the latest version of Eclipse? Thanks, Mike