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Alt key stops working on Java 9

Torsten and me are facing the problem that after a certain time the Alt key stops working: navigating becomes a problem. Quitting and restarting CafeTran solves the problem.

We're both on Java 9 now and since then the problem started.

This nasty issue has been solved in Java's OpenJDK 13.0.1. You’ll have download the DMG again and reinstall CafeTran. Make sure that you’ve made a backup from your user-created auxiliary files, like customer dictionaries, glossary definitions etc. You’ll have to copy them into the new app folder structure.
BTW: you’ll notice that your settings are kept.

I cannot confirm it yet. It may be a Java 9 issue or some external macro/script interference. Note what triggers it. Perhaps changing the shortcut would help.

Yes, it needs longer working to make it happen. And: if it would be a KM problem (of course I've thought of that), wouldn't the fact that after quitting CafeTran the problem is solved, indicate that it's not KM related?

It interferes with navigation via ALT+LEFT and ALT+RIGHT. (The latter is BTW never correct.)

Navigating between words on Mac OSX (ALT+LEFT and ALT+RIGHT) are system shortcuts and they work in Java too. Note that navigation between segments has other default shortcuts (CTRL+ALT+LEFT and CTRL+ALT+RIGHT) on Mac not to interfere with the system shortcuts.

>Navigating between words on Mac OSX (ALT+LEFT and ALT+RIGHT) are system shortcuts and they work in Java too.

Yes. I know. But they stop working in CafeTran, while they keep working in other apps (native ones).

Maybe it has something to do with this here (last posting, "InternalFrame close method was calling setClosed(true)".

Keys do not suddenly stop working, there must a reason

I do not find anything on "Alt-Key stops working" in correlation with "Java 9", when asking Google. Java problem? Swing problem with Java 9? Probably, but only with some specific problem.

  • Buffer overflow (not enough RAM, memory inconsistencies happening after a time "x")? In my case, perhaps, but not for Hans, who is a RAM hamster. Well, maybe Java 9 has a different memory allocation/administration.
  • A small glitch in some of the newer features?
  • Any command that does not work good with Java 9? 

Note to myself and to Hans: Maybe minimizing and maximzing the CT windows helps (I read this somewhere this morning when searching for probable Java issues). But it did not happen yet today (but yesterday about 4 times).

Maybe, there is a pattern for this Java issue on your side? I have checked it several times and it still works.

It often happens only after several hours of working. Yep, I'll keep my eyes on a pattern. Have a nice weekend! Bye.

After a few minutes, the ALT key stops working. I've deactivated all possible interfering apps.

@Torsten: Maybe minimizing and maximzing the CT windows helps

Read that too late this morning ;). Will try it next time when it happens.

This discussion seems to be old, but I've just had this problem for some time (using CafeTran Yeddi) so I came here. I was using Java 10.0.2 that I had downloaded from an Oracle page. I guess this was a JDK (Java Development Kit) which should only be used when you develop Java applications. Now I've removed it and installed a JRE (Java Runtime Environment) "Java 8 update 221" downloaded from instead of Oracle. If you don't want to develop, but only use applications, this is what you should use. I have the impression that this fixed my problem. Besides that, surprise: CafeTran also runs noticeably faster now. (This may also be due to a cleanup of a Java cache that the uninstaller suggested me to run when I removed the existing version from my Mac. Not sure if that cache can be cleaned in a different way as well).

After a couple of segments, ALT+RIGHT and ALT+LEFT stopped working again. Minimising the CafeTran GUI via the yellow icon doesn't fix it.

ALT+RIGHT and ALT+LEFT respond in all open native OS X apps and also in the latest version of Swordfish (Java).

I hope that you'll find the cause.

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