This solution is peculiar only to Netbeans. 1. Make sure the path to your Java project files is not too long 2. Always cross-check project.properties and GWT property files to see what the project property values are. e.g classpath settings, duplicate of added libraries etc. 3. Also, make sure the correct GWT version (>= 2.0) is being used by your project.
Thanks to Uju (G-Nigeria) and especially Juan Pablo for the pointers. Regards On Wed, May 4, 2011 at 12:55 PM, Kayode Odeyemi <[email protected]> wrote: > No I'm not. I'm using DTO to transfer objects to the client. > > > On Wed, May 4, 2011 at 12:48 PM, Juan Pablo Gardella < > [email protected]> wrote: > >> You have this exception: Caused by: java.lang.ClassNotFoundException: >> javax.jdo.spi.Detachable >> >> Are you use JDO in client side? >> >> 2011/5/4 Kayode Odeyemi <[email protected]> >> >>> Firstly, about 2 weeks ago I started receiving the >>> exception, CreateProcess error=87, The parameter is incorrect. This occurs >>> when I try to run my app on devmode on Google App Engine. I have searched >>> all over the internet and I was able to solve this by >>> adding useexternalfile="yes" to ant build.xml at the javadoc target. But, >>> this was solved only when I'm not running in devmode. That is, I'm running >>> the app directly at http://localhost:8888/[app-name]. The error is >>> below; >>> >>> java.io.IOException: Cannot run program >>> "C:\Java\jdk1.6.0_06\jre\bin\java.exe" (in directory >>> "D:\AllData\netBeans_Projects\Listings"): CreateProcess error=87, The >>> parameter is incorrect >>> at java.lang.ProcessBuilder.start(ProcessBuilder.java:459) >>> at java.lang.Runtime.exec(Runtime.java:593) >>> at >>> org.apache.tools.ant.taskdefs.Execute$Java13CommandLauncher.exec(Execute.java:827) >>> at org.apache.tools.ant.taskdefs.Execute.launch(Execute.java:445) >>> at >>> org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:459) >>> at org.apache.tools.ant.taskdefs.Java.fork(Java.java:791) >>> at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:214) >>> at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:135) >>> at org.apache.tools.ant.taskdefs.Java.execute(Java.java:108) >>> at >>> org.datanucleus.enhancer.tools.EnhancerTask.execute(EnhancerTask.java:100) >>> at >>> org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) >>> at sun.reflect.GeneratedMethodAccessor233.invoke(Unknown Source) >>> at >>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) >>> >>> Secondly, I have gotten my app up to advanced stage where I am adding >>> maps, extensive use of GWT for DOM Manipulation to improve UI etc, but when >>> I try to build my app, I get the error below; >>> >>> [ERROR] Unexpected >>> java.lang.NoClassDefFoundError: javax/jdo/spi/Detachable >>> at java.lang.ClassLoader.defineClass1(Native Method) >>> at java.lang.ClassLoader.defineClass(ClassLoader.java:620) >>> at >>> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) >>> at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) >>> at java.net.URLClassLoader.access$000(URLClassLoader.java:56) >>> at java.net.URLClassLoader$1.run(URLClassLoader.java:195) >>> at java.security.AccessController.doPrivileged(Native Method) >>> at java.net.URLClassLoader.findClass(URLClassLoader.java:188) >>> at java.lang.ClassLoader.loadClass(ClassLoader.java:306) >>> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276) >>> at java.lang.ClassLoader.loadClass(ClassLoader.java:251) >>> at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) >>> at java.lang.Class.forName0(Native Method) >>> at java.lang.Class.forName(Class.java:247) >>> at >>> com.google.gwt.dev.javac.TypeOracleMediator.resolveAnnotationValue(TypeOracleMediator.java:710) >>> at >>> com.google.gwt.dev.javac.TypeOracleMediator.createAnnotation(TypeOracleMediator.java:442) >>> at >>> com.google.gwt.dev.javac.TypeOracleMediator.resolveAnnotation(TypeOracleMediator.java:608) >>> at >>> com.google.gwt.dev.javac.TypeOracleMediator.resolveAnnotations(TypeOracleMediator.java:623) >>> at >>> com.google.gwt.dev.javac.TypeOracleMediator.resolveClass(TypeOracleMediator.java:768) >>> at >>> com.google.gwt.dev.javac.TypeOracleMediator.addNewUnits(TypeOracleMediator.java:385) >>> at >>> com.google.gwt.dev.javac.CompilationState.assimilateUnits(CompilationState.java:165) >>> at >>> com.google.gwt.dev.javac.CompilationState.<init>(CompilationState.java:82) >>> at >>> com.google.gwt.dev.javac.CompilationStateBuilder.doBuildFrom(CompilationStateBuilder.java:392) >>> at >>> com.google.gwt.dev.javac.CompilationStateBuilder.buildFrom(CompilationStateBuilder.java:275) >>> at >>> com.google.gwt.dev.cfg.ModuleDef.getCompilationState(ModuleDef.java:299) >>> at com.google.gwt.dev.Precompile.precompile(Precompile.java:529) >>> at com.google.gwt.dev.Precompile.precompile(Precompile.java:466) >>> at com.google.gwt.dev.Compiler.run(Compiler.java:205) >>> at com.google.gwt.dev.Compiler.run(Compiler.java:177) >>> at com.google.gwt.dev.Compiler$1.run(Compiler.java:149) >>> at >>> com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:87) >>> at >>> com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:81) >>> at com.google.gwt.dev.Compiler.main(Compiler.java:156) >>> Caused by: java.lang.ClassNotFoundException: javax.jdo.spi.Detachable >>> at java.net.URLClassLoader$1.run(URLClassLoader.java:200) >>> at java.security.AccessController.doPrivileged(Native Method) >>> at java.net.URLClassLoader.findClass(URLClassLoader.java:188) >>> at java.lang.ClassLoader.loadClass(ClassLoader.java:306) >>> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276) >>> at java.lang.ClassLoader.loadClass(ClassLoader.java:251) >>> at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) >>> ... 33 more >>> >>> One more thing to add is, whenever I make simple changes to the >>> client-side code(GWT), this error pops up as well, which always requires me >>> to clean it and then build again, which obviously have started to refuse to >>> even compile successfully. FYI, most of these problems started occuring when >>> I added to my project libraries gwt-user.jar, majorly because I needed to >>> use JSON to handle a REST request (Response dispatched to a Place using >>> Activity & Place MVP). Initially this jar file was included in my project by >>> default, hence the package com.google.gwt.json wasn't available. >>> >>> Dev environment: >>> >>> - GWT 2.1 >>> - Google App Engine 1.4.3 >>> - JDO >>> - Spring 3 >>> - Activity and Place >>> >>> >>> Can somebody in the name of God help me with this. It's been weeks I've >>> trying to get out of this. >>> >>> Regards >>> -- >>> Odeyemi 'Kayode O. >>> http://www.sinati.com >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Google Web Toolkit" group. >>> To post to this group, send email to [email protected] >>> . >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/google-web-toolkit?hl=en. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google Web Toolkit" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/google-web-toolkit?hl=en. >> > > > > -- > Odeyemi 'Kayode O. > http://www.sinati.com > > -- Odeyemi 'Kayode O. http://www.sinati.com -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. 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