BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Could not find main class. Program will exit!          BorlandTalk.com Forum Index -> JBuilder Deployment View previous topic :: View next topic   Author Message Magnus Guest Posted: Fri Mar 10, 2006 6:03 pm    Post subject: Could not find main class. Program will exit! I have an app that is started via an icon that starts a bat-file with all needed classpath files added. This installation has been working for over 100 installations. Now, I have a client that get the "Could not find main class. Program will exit!" message. What could cause this? Using WinXP. He first tried with JRE 1.5.6 and the 1.4.3 and have been un-installing and installing the app in various step and order to make it work but always the same problem. He has another PC where it works so I asked him to send me the 2 different classpaths since I don't know where else to look. TIA Back to top Arthur Ore Guest Posted: Sat Mar 11, 2006 1:03 pm    Post subject: Re: Could not find main class. Program will exit! Hi Magnus, I don't know if this helps, but I'm sure I had a similar situation a couple of years ago, when I ftp'd a jar file from one machine to another. I forgot to put ftp into binary mode, which must have caused a corruption. Don't know whether that could have happened here? Arth "Magnus" <magnus_bjorkman (AT) yahoo (DOT) com> wrote in message news:4411b8b6$1 (AT) newsgroups (DOT) borland.com... Quote: I have an app that is started via an icon that starts a bat-file with all needed classpath files added. This installation has been working for over 100 installations. Now, I have a client that get the "Could not find main class. Program will exit!" message. What could cause this? Using WinXP. He first tried with JRE 1.5.6 and the 1.4.3 and have been un-installing and installing the app in various step and order to make it work but always the same problem. He has another PC where it works so I asked him to send me the 2 different classpaths since I don't know where else to look. TIA Back to top Magnus Guest Posted: Sat Mar 11, 2006 9:03 pm    Post subject: Re: Could not find main class. Program will exit! Arth, Thanks for your input but that can not be the case here since the installation is from an innosetup script that installs everything. The installation could not have been "corrupt" either since they could install and run on another machine. Still a puzzle to me. Arthur Ore wrote: Quote: Hi Magnus, I don't know if this helps, but I'm sure I had a similar situation a couple of years ago, when I ftp'd a jar file from one machine to another. I forgot to put ftp into binary mode, which must have caused a corruption. Don't know whether that could have happened here? Arth "Magnus" <magnus_bjorkman (AT) yahoo (DOT) com> wrote in message news:4411b8b6$1 (AT) newsgroups (DOT) borland.com... I have an app that is started via an icon that starts a bat-file with all needed classpath files added. This installation has been working for over 100 installations. Now, I have a client that get the "Could not find main class. Program will exit!" message. What could cause this? Using WinXP. He first tried with JRE 1.5.6 and the 1.4.3 and have been un-installing and installing the app in various step and order to make it work but always the same problem. He has another PC where it works so I asked him to send me the 2 different classpaths since I don't know where else to look. TIA Back to top Magnus Guest Posted: Mon Mar 27, 2006 5:04 pm    Post subject: Re: Could not find main class. Program will exit! (some feed I was told that they have another SW installed that change the classpath. However, they didn't tell me what SW or what the change was. Does anyone know of a way to get the "latest" JRE from the registry and use that in a bat file where I define the classpath needed to run my SW? Magnus Magnus wrote: Quote: Arth, Thanks for your input but that can not be the case here since the installation is from an innosetup script that installs everything. The installation could not have been "corrupt" either since they could install and run on another machine. Still a puzzle to me. Arthur Ore wrote: Hi Magnus, I don't know if this helps, but I'm sure I had a similar situation a couple of years ago, when I ftp'd a jar file from one machine to another. I forgot to put ftp into binary mode, which must have caused a corruption. Don't know whether that could have happened here? Arth "Magnus" <magnus_bjorkman (AT) yahoo (DOT) com> wrote in message news:4411b8b6$1 (AT) newsgroups (DOT) borland.com... I have an app that is started via an icon that starts a bat-file with all needed classpath files added. This installation has been working for over 100 installations. Now, I have a client that get the "Could not find main class. Program will exit!" message. What could cause this? Using WinXP. He first tried with JRE 1.5.6 and the 1.4.3 and have been un-installing and installing the app in various step and order to make it work but always the same problem. He has another PC where it works so I asked him to send me the 2 different classpaths since I don't know where else to look. TIA Back to top Magnus Guest Posted: Wed Apr 19, 2006 2:03 pm    Post subject: Re: Could not find main class. Program will exit!-Solved? We finally managed to find the problem. Oracle had put a couple of javaw.exe on the PC that were found first when launched. Fix: The bat file was changed from "javaw -classpath ".\classes\jdat ..." to "C:\WINDOWS\SYSTEM32\javaw -classpath ".\classes\jdat...". Now the APP starts without any problem. Q: Would it be safer to always refer to the full C:\WINDOWS\SYSTEM32 path in the bat-file or can I end up with other problems if I do this? I don't want to change anything on the PC like PATH, CLASSPATH, etc. TIA Quote: I have an app that is started via an icon that starts a bat-file with all needed classpath files added. This installation has been working for over 100 installations. Now, I have a client that get the "Could not find main class. Program will exit!" message. What could cause this? Back to top Lori M Olson [TeamB] Guest Posted: Thu Apr 20, 2006 2:04 am    Post subject: Re: Could not find main class. Program will exit!-Solved? Magnus wrote: Quote: We finally managed to find the problem. Oracle had put a couple of javaw.exe on the PC that were found first when launched. Fix: The bat file was changed from "javaw -classpath ".\classes\jdat ..." to "C:\WINDOWS\SYSTEM32\javaw -classpath ".\classes\jdat...". Now the APP starts without any problem. Q: Would it be safer to always refer to the full C:\WINDOWS\SYSTEM32 path in the bat-file or can I end up with other problems if I do this? I don't want to change anything on the PC like PATH, CLASSPATH, etc. TIA I hate Oracle. I really, really do. The installer jams crap onto the front of the PATH that always breaks every Java(tm) app on the system. I'm afraid nothing is "safe" about using the C:\WINDOWS\SYSTEM32\javaw.exe file. On Windows, the "last Java installed" always wins. So if you use the "java.exe" or "javaw.exe" from the SYSTEM32 directory, the Java version can change out from under you. If you have a specific version of Java that you want to use, you might want to reference the real javaw.exe (those ones in SYSTEM32 are stubs that look in the registry for the real location), from a specific JRE, like "C:\Program Files\Java\jre1.5.0_04\bin\javaw.exe" -- Regards, Lori Olson [TeamB] ------------ Save yourself, and everyone else, some time and search the newsgroups and the FAQ-O-Matic before posting your next question. 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