I want to reverse engineer some 65816 code using Ghidra. Unfortunately the third-party 65816 language is broken. No problem, I can fix it myself. However, looking at the Ghidra error gives me no clue as to what the problem is. I've looked at the .slaspec and it appears to be correct so a verbose error would be helpful. The message mentions checking the log messages but I can't find anything.

Is there a way to debug the problem with the language?

Ghidra Error:

Errors compiling /home/rob/tools/ghidra_10.2.3_PUBLIC/Ghidra/Processors/65816/data/languages/65816.slaspec -- please check log messages for details
ghidra.app.plugin.processors.sleigh.SleighException: Errors compiling /home/rob/tools/ghidra_10.2.3_PUBLIC/Ghidra/Processors/65816/data/languages/65816.slaspec -- please check log messages for details
    at ghidra.app.plugin.processors.sleigh.SleighLanguage.reloadLanguage(SleighLanguage.java:520)
    at ghidra.app.plugin.processors.sleigh.SleighLanguage.initialize(SleighLanguage.java:150)
    at ghidra.app.plugin.processors.sleigh.SleighLanguage.<init>(SleighLanguage.java:116)
    at ghidra.app.plugin.processors.sleigh.SleighLanguageProvider.getNewSleigh(SleighLanguageProvider.java:112)
    at ghidra.app.plugin.processors.sleigh.SleighLanguageProvider.getLanguage(SleighLanguageProvider.java:99)
    at ghidra.program.util.DefaultLanguageService$LanguageInfo.lambda$getLanguage$0(DefaultLanguageService.java:385)
    at ghidra.util.task.TaskBuilder$TaskBuilderTask.run(TaskBuilder.java:306)
    at ghidra.util.task.Task.monitoredRun(Task.java:134)
    at ghidra.util.task.TaskRunner.lambda$startTaskThread$0(TaskRunner.java:106)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at java.base/java.lang.Thread.run(Thread.java:833)

65816 language support

Example binary

  • 1
    Could you please check if you have application.log file in /home/rob/.ghidra/ directory or in any subdirectories?
    – malikcjm
    Apr 15 at 21:54
  • @malikcjm I hadn't thought to check there. Unfortunately that directory is empty though. Apr 16 at 10:19
  • Please try to look for application.log file in /home/rob/tools/ghidra_10.2.3_PUBLIC/ directory or any subdirectories
    – malikcjm
    Apr 17 at 11:07
  • @malikcjm There are no logs Apr 17 at 11:50
  • 2
    I see that there were some problems with released versions up to 1.02. With latest changes I had no problem loading you example binary. github.com/achan1989/ghidra-65816/commit/…
    – malikcjm
    Apr 20 at 19:37

1 Answer 1


I see that there were some problems with released versions up to 1.02. With latest changes I had no problem loading your example binary. https://github.com/achan1989/ghidra-65816/commit/6df2b00cf27af4bc3c259cf499ca2ea9b6f92522

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