BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Native executable can't find Java          BorlandTalk.com Forum Index -> JBuilder IDE View previous topic :: View next topic   Author Message John T. Dow Guest Posted: Tue May 01, 2007 10:49 pm    Post subject: Native executable can't find Java After months, even years, suddenly I get this message trying to run any of the native executables I have (even old ones). "Unable to find a supported JDK or JRE version. Version 1.3.1 or higher is required. Check your installation and use +javahome to specify the JDK or JRE location" There is no problem if +javahome is used to point to the JDK or JRE. I don't know exactly when it broke because when developing I don't use the native executables, only when I deploy. I suppose I updated Java, or something. Since this has happened, I've updated Java to give it a chance to repair whatever is broken, but still the problem persists. I've googled many times and find reference to this message but never in reference to JBuilder native executables. Is there something to fix in the registry? John Back to top Kevin Dean [TeamB] Guest Posted: Wed May 02, 2007 1:38 am    Post subject: Re: Native executable can't find Java John T. Dow wrote: Quote: I've googled many times and find reference to this message but never in reference to JBuilder native executables. Is there something to fix in the registry? Take a look at the "CurrentVersion" key in "HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment" and play with the values (1.3, 1.4, 1.5) to match what's installed and see if that works. Also, when you type "java -version" on the command line, what do you get? -- Kevin Dean [TeamB] Dolphin Data Development Ltd. http://www.datadevelopment.com/ Please see Borland's newsgroup guidelines at http://info.borland.com/newsgroups/guide.html Back to top John T. Dow Guest Posted: Wed May 02, 2007 11:35 pm    Post subject: Re: Native executable can't find Java "Kevin Dean [TeamB]" <NkOdSePaAnM (AT) datadevelopment (DOT) com> wrote in news:xn0f5oyc348245000-kdean (AT) www (DOT) teamb.com: Quote: John T. Dow wrote: I've googled many times and find reference to this message but never in reference to JBuilder native executables. Is there something to fix in the registry? Take a look at the "CurrentVersion" key in "HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment" and play with the values (1.3, 1.4, 1.5) to match what's installed and see if that works. Also, when you type "java -version" on the command line, what do you get? I tried various things in the registry, but still no joy. java -version displays this: java version "1.6.0_01" Java(TM) SE Runtime Environment (build 1.6.0_01-b06) Java HotSpot(TM) Client VM (build 1.6.0_01-b06, mixed mode, sharing) In the registry, at "HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment" "CurrentVersion" has "1.6" I tried 1.4, 1.5. BrowserJavaVersion has 1.6.0_11 and I tried various values there. [default] had no value, I tried 1.5, 1.5.0_11, 1.6. This is what appears under "Java Runtime Environment" 1.4.2_13 1.5 1.5.0 1.5.0_10 1.5.0_11 1.6 1.6.0_11 Why is there no 1.4? Why is there no 1.4.2 and no 1.6.0? BTW, my JBuilder is 2006 so it's expecting 1.5, but I've tried various settings when building the native excecutable. John Back to top Kevin Dean [TeamB] Guest Posted: Thu May 03, 2007 1:48 am    Post subject: Re: Native executable can't find Java John T. Dow wrote: Quote: BTW, my JBuilder is 2006 so it's expecting 1.5, but I've tried various settings when building the native excecutable. Try running the raw JAR file: java -jar <jarfilename> What happens then? -- Kevin Dean [TeamB] Dolphin Data Development Ltd. http://www.datadevelopment.com/ Please see Borland's newsgroup guidelines at http://info.borland.com/newsgroups/guide.html Back to top John T. Dow Guest Posted: Thu May 03, 2007 1:57 am    Post subject: Re: Native executable can't find Java "Kevin Dean [TeamB]" <NkOdSePaAnM (AT) datadevelopment (DOT) com> wrote in news:xn0f5qd5j825v4000-kdean (AT) www (DOT) teamb.com: Quote: John T. Dow wrote: BTW, my JBuilder is 2006 so it's expecting 1.5, but I've tried various settings when building the native excecutable. Try running the raw JAR file: java -jar <jarfilename What happens then? "Invalid or corrupt jarfile <fullpath of jar file>" Back to top Kevin Dean [TeamB] Guest Posted: Thu May 03, 2007 5:41 am    Post subject: Re: Native executable can't find Java John T. Dow wrote: Quote: "Invalid or corrupt jarfile <fullpath of jar file>" The problem then is your Java installation. At this point, I would recommend uninstalling all versions of Java and reinstalling them. -- Kevin Dean [TeamB] Dolphin Data Development Ltd. http://www.datadevelopment.com/ Please see Borland's newsgroup guidelines at http://info.borland.com/newsgroups/guide.html Back to top John T. Dow Guest Posted: Thu May 03, 2007 5:30 pm    Post subject: Re: Native executable can't find Java "Kevin Dean [TeamB]" <NkOdSePaAnM (AT) datadevelopment (DOT) com> wrote in news:xn0f5qjaugdqhg000-kdean (AT) www (DOT) teamb.com: Quote: John T. Dow wrote: "Invalid or corrupt jarfile <fullpath of jar file>" The problem then is your Java installation. At this point, I would recommend uninstalling all versions of Java and reinstalling them. Before I do that, remember that I can run Java without problem. The only problem is that native executables, whether they've been around for months or have just been built, give this error message. However, they all run if I specify the +javahome parameter and provide the proper path. I can run JBuilder2006 and JBuilder2007. DBPilot runs without doing anything different. Also, what do you mean by "uninstalling Java". Each JBuilder has its own JDK in addition to the several updates I've installed independently. I don't see any trace of those JDK's in the registry, so what is meant by ininstalling those 2 JDK's? Or can they stay. I can certainly uninstall the JDK's and JRE's I've installed from java.com. Would that be sufficient? After uninstalling, I presume I should scan the registry for any lingering reference to Java. Currently all my versions of Java are under C:\Program Files\Java but in the past I had some in another location. Is this a Windows registry problem? A Windows environment variable? Not Windows related at all? John Back to top John T. Dow Guest Posted: Thu May 03, 2007 5:46 pm    Post subject: Re: Native executable can't find Java "John T. Dow" <john (AT) johntdow (DOT) com> wrote in news:Xns9925567A2AF8Ejohnjohntdowcom (AT) 207 (DOT) 105.83.66: Quote: "Kevin Dean [TeamB]" <NkOdSePaAnM (AT) datadevelopment (DOT) com> wrote in news:xn0f5qjaugdqhg000-kdean (AT) www (DOT) teamb.com: John T. Dow wrote: "Invalid or corrupt jarfile <fullpath of jar file>" The problem then is your Java installation. At this point, I would recommend uninstalling all versions of Java and reinstalling them. The problem has been fixed. I began removing java versions, checking after each to see if a native executable would run. Success after removing the first jdk! Strangely, jdk 5.0 update 10 made no registry changes when it was removed. Also, its directory under c:\program files\java was not removed. I had to delete it manually. After jdk 5.0 update 10 was removed the native executable problem vanished. I also removed jdk 5.0 update 11. It made registry changes and removed the files. I removed jre 5.0 update 10. It too made registry changes and removed its files. The native executable problem has not returned. So there was something bogus about jdk 5.0 update 10. 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