Hi all I'm getting error below while building index from this tile: https://files.mkgmap.org.uk/download/523/31177029.o5m. Minimum mkgmap options triggering the error are: java -jar mkgmap-trunk.jar --bounds=bounds.zip --index --unicode 31177029.o5m Another tile from the same splitter run also fails but all other 65 of 67 build fine. With --code-page=936 they all build fine. Command output: Exception in thread "main" java.lang.AssertionError: 10586 at uk.me.parabola.imgfmt.app.FileBackedImgFileWriter.putNu(FileBackedImgFileWriter.java:215) at uk.me.parabola.imgfmt.app.mdr.Mdr29.writeSectData(Mdr29.java:94) at uk.me.parabola.imgfmt.app.mdr.MDRFile.writeSection(MDRFile.java:424) at uk.me.parabola.imgfmt.app.mdr.MDRFile.writeSections(MDRFile.java:388) at uk.me.parabola.imgfmt.app.mdr.MDRFile.write(MDRFile.java:270) at uk.me.parabola.mkgmap.combiners.MdrBuilder.onFinish(MdrBuilder.java:331) at uk.me.parabola.mkgmap.main.Main.endOptions(Main.java:690) at uk.me.parabola.mkgmap.CommandArgsReader.readArgs(CommandArgsReader.java:126) at uk.me.parabola.mkgmap.main.Main.mainStart(Main.java:147) at uk.me.parabola.mkgmap.main.Main.main(Main.java:118)