[Qgis-developer] error : qgis: symbol lookup error: /usr/lib/qgis/libqgis_plugin_va.so: undefined symbol: _ZN12vARubberBandC1EP12QgsMapCanvas

[nitin quick]

I know this may not be proper place to ask this question but i am stuck here
with this run time error.

qgis: symbol lookup error: /usr/lib/qgis/libqgis_plugin_va.so: undefined
symbol: _ZN12vARubberBandC1EP12QgsMapCanvas

This code belong to a plugin whch i have written. Here  vARubberBand (
similar to of QgsRubberBand)  inherits from QgsMapCanvasItem, and main
plugin class vA do it from QgsMaptool. vA class has a objct of type
vARubberBand.

Also similar error appeared when i ported my wel working code from one
machine to other machine.
I have tried a few methods like declaring vARubberBand in a namespace to
avoid redeclaration but no fruit.
please guide me out of here.
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