android ant build fails on ant release command

I have linux box. I have project on it. I ran "android update project" it worked fine.

Tried using "ant -v release" it throws me error as follows:-

    [javac] /home/sto/umakant/dashboard/data/android_apps/lol/project/src/com/glam/lol/Channels.java:90: error while writing <anonymous com.glam.lol.Channels$1>: could not create parent directories
    [javac]             lv.setOnIt开发者_高级运维emClickListener(new OnItemClickListener() {
    [javac]                                                                 ^
    [javac] Note: Some input files use unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 1 error

BUILD FAILED
/home/sto/umakant/android-sdk-linux_x86/tools/ant/main_rules.xml:384: Compile failed; see the compiler error output for details.

I don't understand whats the problem with it. Why its not allowing me to build the application? Can some one would help me out.

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This was permission problem. Some folders where not having write permission in project. Now it works fine when permission is corrected.