Problem with build.xml file

[roohi]

The ant jar file is included in sub-project and its used only within this sub-project, But it  giving the error :

nested exception is java.io.FileNotFoundException: class path resource [org/apache/tools/ant/types/Path.class] cannot be opened because it does not exist

If i copy the jar file in master project it works fine. but it need not to be added in master project as it is used only within sub-project.

Please comment and help to find solution.
Thanks

[roohi]

Got the solution of the problem .

we are running a shell script which call all the program , so before calling any master or sub project we copy all the jar file at one common lib path , which solves the issue.

Thanks