Error when Building Simple Project

[Former Member]

Hello Community!

I am developing a new project in the NWDS / NWDI by [this tutorial.[http://help.sap.com/saphelp_nw70/helpdata/en/44/0d18d725301a78e10000000a1553f6/frameset.htm].

When I am in the Java Perspective and in the Java DC Explorer and want to build my DC (Right Click -> Development Component -> Build...), II always get this error prompt:

- I have tried out many different versions of the JDK, but nothing works.

- I have also done [this step|http://www.drftpd.org/forums/viewtopic.php?f=5&t=2978]

Can you help me?

10.10.2011 11:31:22 /userOut/Development Component (com.sap.ide.eclipse.component.provider.listener.DevConfListener) [Thread[ModalContext,5,main]] ERROR: test/tax/calc: Build failed for vwg.audi.in/test/tax/calc(vwg.audi.in_APPLICATION_1) in variant "default": The Build terminated with errors

------------------------------------- Build log ------------------------------------------------------
Development Component Build (2011-10-10 11:31:22)
  Component name: test/tax/calc
  Component vendor: vwg.audi.in
  SC compartment: vwg.audi.in_APPLICATION_1
  Configuration: AZB_APPLFIN_D
  Location: AZB_APPLFIN_D
  Source code location: http://isazbdbz:54400/dtr/ws/APPLFIN/vwg.audi.in_APPLICATION/dev/inactive/DCs/vwg.audi.in/test/tax/calc/_comp/
  DC root folder: C:\Dokumente und Einstellungen\UO94F87\.dtc\0\DCs\vwg.audi.in\test\tax\calc\_comp\
  DC type: Java
  Host: audiinc07394527

DC Model check:
   All used DCs are available locally
   validating dependency to build plugin "sap.com/tc/bi/bp/javaLib"
   DC model check OK

Start build plugin:
   using build plugin: sap.com/tc/bi/bp/javaLib
   starting build plugin from : C:\Dokumente und Einstellungen\UO94F87\.dtc\0\DCs\sap.com\tc\bi\bp\javaLib\_comp\gen\default\public\saplib\



Build Plugin 'JavaPlugin', Version 7.00 SP 15 (645_VAL_REL, built on 2008-02-16 00:52:15 CET, CL79160)
   development component:  test/tax/calc (vwg.audi.in)
      software component:  APPLICATION (vwg.audi.in)
                location:  AZB_APPLFIN_D
                    type:  Java
           build variant:  default
         output location:  C:\Dokumente und Einstellungen\UO94F87\.dtc\0\DCs\vwg.audi.in\test\tax\calc\_comp\gen\default
       generation folder:  C:\Dokumente und Einstellungen\UO94F87\.dtc\0\t\38AAC310BC92CAB879CB0B2FFFDE0EF0
       plugin start time:  2011-10-10 11:31:22 GMT+01:00 (CEST)
                 Java VM:  Java HotSpot(TM) Client VM, 10.0-b22 (Sun Microsystems Inc.)
General options:
  convert *.xlf to *.properties: yes
  include sources for debugging: yes

Checking path lengths for sources
Path length checks finished in 0 seconds

Preparing data context..
No 'default' JDK defined, will use running VM.
Warning: Did not find any tools.jar in C:\Programme\Java\jre1.6.0_06
Data context preparation finished in 0.031 seconds

Creating Ant build file..
  Creating output file: C:\Dokumente und Einstellungen\UO94F87\.dtc\0\DCs\vwg.audi.in\test\tax\calc\_comp\gen\default\logs\build.xml
  Using macro file:     C:\Dokumente und Einstellungen\UO94F87\.dtc\0\DCs\sap.com\tc\bi\bp\javaLib\_comp\gen\default\public\saplib\macros\build.vm
Build file creation finished in 0.078 seconds

Starting Ant..
  Using build file:     C:\Dokumente und Einstellungen\UO94F87\.dtc\0\DCs\vwg.audi.in\test\tax\calc\_comp\gen\default\logs\build.xml
  Using build target:   build
  Using Ant version:    1.6.2

compile:
      [echo] Starting Java compiler
      [echo] Settings:
      [echo]         debug: on
      [echo]      optimize: off
      [echo]   deprecation: default
      [echo]       verbose: default
      [echo]      encoding: UTF8
      [echo]        source: default
      [echo]        target: default
      [echo]   source path: C:\Dokumente und Einstellungen\UO94F87\.dtc\0\DCs\vwg.audi.in\test\tax\calc\_comp\src\packages
      [echo]    class path: none
      [echo]    output dir: C:\Dokumente und Einstellungen\UO94F87\.dtc\0\t\38AAC310BC92CAB879CB0B2FFFDE0EF0\classes
     [javac] Compiling 3 source files to C:\Dokumente und Einstellungen\UO94F87\.dtc\0\t\38AAC310BC92CAB879CB0B2FFFDE0EF0\classes
Error: C:\Dokumente und Einstellungen\UO94F87\.dtc\0\DCs\vwg.audi.in\test\tax\calc\_comp\gen\default\logs\build.xml:74: Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK
	at org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.getCompiler(CompilerAdapterFactory.java:105)
	at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:929)
	at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:758)
	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
	at org.apache.tools.ant.Task.perform(Task.java:364)
	at org.apache.tools.ant.Target.execute(Target.java:341)
	at org.apache.tools.ant.Target.performTasks(Target.java:369)
	at org.apache.tools.ant.Project.executeTarget(Project.java:1214)
	at com.sap.tc.buildplugin.techdev.ant.util.AntRunner.run(AntRunner.java:116)
	at com.sap.tc.buildplugin.DefaultAntBuildAction.execute(DefaultAntBuildAction.java:58)
	at com.sap.tc.buildplugin.DefaultPlugin.handleBuildStepSequence(DefaultPlugin.java:196)
	at com.sap.tc.buildplugin.DefaultPlugin.performBuild(DefaultPlugin.java:168)
	at com.sap.tc.buildplugin.DefaultPluginV3Delegate$BuildRequestHandler.handle(DefaultPluginV3Delegate.java:66)
	at com.sap.tc.buildplugin.DefaultPluginV3Delegate.requestV3(DefaultPluginV3Delegate.java:48)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.sap.tc.buildtool.v2.impl.PluginHandler2.maybeInvoke(PluginHandler2.java:350)
	at com.sap.tc.buildtool.v2.impl.PluginHandler2.request(PluginHandler2.java:99)
	at com.sap.tc.buildtool.v2.impl.PluginHandler2.build(PluginHandler2.java:73)
	at com.sap.tc.buildtool.PluginHandler2Wrapper.execute(PluginHandler2Wrapper.java:59)
	at com.sap.tc.devconf.impl.DCProxy.make(DCProxy.java:1750)
	at com.sap.tc.devconf.impl.DCProxy.make(DCProxy.java:6004)
	at com.sap.ide.eclipse.component.provider.actions.dcproject.BuildAction.buildDCsForDevConfig(BuildAction.java:307)
	at com.sap.ide.eclipse.component.provider.actions.dcproject.BuildAction.access$200(BuildAction.java:58)
	at com.sap.ide.eclipse.component.provider.actions.dcproject.BuildAction$1.run(BuildAction.java:212)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:101)

Ant runtime 0.172 seconds

Ant build finished with ERRORS

Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK

Error: Build stopped due to an error: Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK

Build plugin finished at 2011-10-10 11:31:22 GMT+01:00 (CEST)
Total build plugin runtime: 0.485 seconds

Build finished with ERROR

[ErvinSzolke · Accepted solution]

Dear sap_user_union_001 ,

please check the SapNetweaverDeveloperStudio.ini file which has a -vm parameter. This file is availble in your eclipse folder.

This has to point to a JDK. Please doublecheck it.

Despite the error message it has nothing to do with the JAVA_HOME environment variable, it is only a generic error message if javac is not found.

@John: Please, I kindly ask you to be polite and deliver valuable answers.

Answers like "google for it" are not moving forward towards the solution.

Thank you!

Best Regards,

Ervin

[junwu · Accepted solution]

sorry for that.

i think he is using NW7 NWDS

put this in the shortcut to your IDE

"C:\Program Files\SAP\IDE\IDE70\eclipse\SapIde.exe" -vm "C:\j2sdk1.4.2_19\bin\javaw.exe"

go to window ->preferences->Java--->Installed JRE,

point to your JDK.

[ErvinSzolke]

Hi,

if you are using NWDS 70X then John is right that case please proceed as he described, else if your NWDS is >= 710 please refer to my memo.

@John: Thank you!

Regards,

Ervin

[Former Member]

@ John Wu!

You are right!

I have solved my problem.

Thank yoo for your helpful answer.

I use NWDI 7.01 SP7 and JDK 1.5 / 5.

So I replaced only:

C:\Programme\SAP\IDE\IDE70\eclipse\SapIde.exe -vm "C:\Programme\Java\JDK1.5\jdk\bin\javaw.exe"

And now it works fine

[junwu]

it's better to use jdk1.4.

if my memory is right, the code will be compile by jdk5 under that configuration, which cannot be deployed to NW server.

if you can deploy your application, just ignore it.

[Former Member]

I try to deploy my application on a remote-computer with a J2EE Engine.

But I have problems with the SDM - Passoword....

[ErvinSzolke]

Hi,

are you sure that you have specified JDK and not JRE ?

JRE has no javac executable.

I hope this helps.

Regards,

Ervin

[junwu]

Unable to find a javac compiler; com.sun.tools.javac.Main is not on the classpath. Perhaps JAVA_HOME does not point to the JDK

it is stated quite clear.

[Former Member]

OK.

And how can I solve this Problem?

[junwu]

buddy , are you java developer?

please google how to point to jdk