JPEXS Free Flash Decompiler Issue Tracker

I have a folder with 9383 SWF files. When I export it with the FFdec command line, sometimes it works, and sometimes it fails. > What steps will reproduce the problem? Download the zip file linked, unzip it, and run : ``` FFDec -format sprite:svg,script:as -export script ./out ./maps ``` Note that you might need to run the command several times, as the bug doesn't appear all the time... > What is the expected output? What do you see instead? I expect to see the command finish successfully (which happens sometimes), all the time. But sometimes I get : ``` FAIL: Exporting Failed on Exception - May 13, 2025 10:23:42 PM com.jpexs.decompiler.flash.console.CommandLineArgumentParser parseExport SEVERE: null java.util.ConcurrentModificationException at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1096) at java.base/java.util.ArrayList$Itr.next(ArrayList.java:1050) at com.jpexs.helpers.CancellableWorker.cancelBackgroundThreads(CancellableWorker.java:287) at com.jpexs.decompiler.flash.console.CommandLineArgumentParser.parseExport(CommandLineArgume ntParser.java:2284) at com.jpexs.decompiler.flash.console.CommandLineArgumentParser.parseArgumentsInternal(Comman dLineArgumentParser.java:671) at com.jpexs.decompiler.flash.console.CommandLineArgumentParser.parseArguments(CommandLineArg umentParser.java:468) at com.jpexs.decompiler.flash.gui.Main.main(Main.java:3134) ``` > What version of the product are you using? Is it "nightly build"? Which operating system do you have? `v.22.0.2 nightly build 3115` on Mac