The command below produces an assertion while compiling this tile <https://files.mkgmap.org.uk/download/526/31191025.o5m> from Japan. Process continues with remaining tiles and finishes without "Number of MapFailedExceptions: 1" as expected. This is with r4813, but I also tried with an old version of mkgmap with the same result. java -Xmx27G -ea -jar mkgmap.jar--code-page=632 31191025.o5m Mkgmap version 4813 Time started: Tue Nov 09 20:18:16 CET 2021 WARNING (global): Setting max-jobs to 8 Exception in thread "main" java.lang.AssertionError: found trailing 0 in chars at uk.me.parabola.imgfmt.app.labelenc.EncodedText.<init>(EncodedText.java:39) at uk.me.parabola.imgfmt.app.labelenc.AnyCharsetEncoder.encodeText(AnyCharsetEncoder.java:112) at uk.me.parabola.imgfmt.app.lbl.LBLFile.newLabel(LBLFile.java:132) at uk.me.parabola.imgfmt.app.lbl.PlacesFile.createPOI(PlacesFile.java:253) at uk.me.parabola.imgfmt.app.lbl.LBLFile.createPOI(LBLFile.java:172) at uk.me.parabola.mkgmap.build.MapBuilder.processPOIs(MapBuilder.java:670) at uk.me.parabola.mkgmap.build.MapBuilder.makeMap(MapBuilder.java:325) at uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:114) at uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:62) at uk.me.parabola.mkgmap.main.Main.lambda$processFilename$1(Main.java:291) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:829)