Facing Problem while building DC

[Former Member]

Hi All,

I have instatlled NWDS and creted one DC and then then i created a class inside that DC . After that I created a public part to reuse my class from other DC's but I am facing problem when I am trying to build this DC.Any help in this regard is welcome. Thank You.

Error:
*****\flexprofiles$\Desktop\*****\Documents\.dtc\0\DCs\sap.com\home\testdc3\_comp\gen\default\logs\build.xml:150: 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 19.484 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 2009-11-13 11:17:03 GMT+05:30

Total build plugin runtime: 26.015 seconds

Build finished with ERROR

Edited by: Pratibha Rauthan on Nov 13, 2009 7:05 AM

[Former Member]

Hi All,

Thanks for help , but problem could not be resolved .

[Former Member]

Hi Pratibha,

User eclipse folder inside the folder where NWDS is installed, along with the plugins folder you can see a Vm Parameters File.

The content in the Parameter file should look something like this

-DJDK1.4.2_HOME=C:\j2sdk1.4.2_12

-Xmx512m

-Xms128m

-XX:PermSize=32m

-XX:MaxPermSize=128m

Here check the name of the JDK version that you are using along with the JDK Home path.

Regards,

Tushar Sinha

[Former Member]

Hi Pratibha,

1. Check under Window>Preference>Java>Installed JREs that the correct JRE is pointed to.

2. Set the class path of JAVA_HOME to JDK and not JRE. Then, restart your NWDS.

Regards,

Tushar SInha

[siarhei_pisarenka3]

Hi Pratibha Rauthan

>JAVA_HOME should point to JDK but not the JRE

This is not the truth. IDE does not need JDK at all, only JRE. JDK is only for comfort in development

JAVA_HOME is not related to the problem. Check that list of Java->Installed JREs in Preferences of SAP IDE 7.0 points to the necessary default JRE. If it's not just add the JRE there.

In SAP IDE 7.1 additionally JRE version is specified in the Development Configuration properties. But again it must be in Installed JREs.

BR, Siarhei

[Former Member]

Hi Pratibha,

If the above solution doesn't work, then uninstall NWDS and JDK and then install them again.

I faced this problem a few days ago and it helped.

[Former Member]

Hi Prathiba,

JAVA_HOME should point to JDK but not the JRE. When you are doing a build on DC it will search for Javac compiler which is not pointitng to JDK. set the class path of JAVA_HOME to JDK and restart your IDE and check it should work fine.

set the classpath of JAVA_HOME

JAVA_HOME - C:\Program Files\Java\JDK_version

Hope this helps you...

Regards,

Saleem