Hi,
  I am relatively new to Maven and display tag. I am trying to create a display 
tag jar with maven 2.0.1 from the source of displaytag-1.0. I was getting 
exception when i tried to build it from source. Can somebody please help me to 
overcome this problem.?

I have used the following command for build:
    mvn -f project.xml


I was getting the following error:

[INFO] Scanning for projects...
[INFO] -------------------------------------------------------------------------
---
[ERROR] FATAL ERROR
[INFO] -------------------------------------------------------------------------
---
[INFO] Error building POM (may not be this project's POM).


Project ID: unknown
POM Location: C:\Downloads\TempDisplayTag\displaytag-1.0-src\displaytag-1.0\proj
ect.xml

Reason: Not a v4.0.0 POM.


[INFO] -------------------------------------------------------------------------
---
[INFO] Trace
org.apache.maven.reactor.MavenExecutionException: Not a v4.0.0 POM.
        at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:365)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:278)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:249)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)

        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.project.InvalidProjectModelException: Not a v4.0.0 P
OM.
        at org.apache.maven.project.DefaultMavenProjectBuilder.readModel(Default
MavenProjectBuilder.java:1125)
        at org.apache.maven.project.DefaultMavenProjectBuilder.readModel(Default
MavenProjectBuilder.java:1096)
        at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromSourceFi
le(DefaultMavenProjectBuilder.java:289)
        at org.apache.maven.project.DefaultMavenProjectBuilder.build(DefaultMave
nProjectBuilder.java:274)
        at org.apache.maven.DefaultMaven.getProject(DefaultMaven.java:515)
        at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:447)
        at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:351)
        ... 11 more
[INFO] -------------------------------------------------------------------------
---
[INFO] Total time: < 1 second
[INFO] Finished at: Mon Feb 06 14:20:26 CST 2006
[INFO] Final Memory: 1M/2M
[INFO] -------------------------------------------------------------------------
---

     

Thanks and Regards
Subrahmanyam Mannam
 
 
 



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