clearcase - Eclipse failing to delete temp directory in VOB while building plug-in jar -

i have issue exporting plug-in jar in eclipse pde: when try export plug-in jar, failing errors like

the following error occurred while executing line: xyzlocation\build.xml:63: unable delete file xyzlocation temp.folder\@dot.bin\...x.class 

here location clearcase vob.
eclipse failing delete temp directory vob while building plug-in jar.
tried of alternatives,could not find solution.
how prevent error?

make sure that:

• the full path of temp directory within vob path referenced clearcase view (dynamic or snapshot one).
• the temp directory not directly within view (at same level vob), inside vob.