All of a sudden I cannot deploy my Android app.

All of a sudden I cannot deploy my Android app.

[Copy Error]
Unable to copy file ".\Android\Debug\MSD\library\lib\armeabi-v7a\libMSD.so" to
".\Android\Debug\MSD\debug\libMSD.so". Could not find a part of the path
'.\Android\Debug\MSD\library\lib\armeabi-v7a\libMSD.so'.

I have Googled but did not find a solution. Does anyone know how to fix this?