Error when launching project on mobile device

LogPlayLevel: BUILD FAILED

LogPlayLevel: C:\android-sdk-windows\tools\ant\build.xml:888: The following error occurred while executing this line:

LogPlayLevel: C:\android-sdk-windows\tools\ant\build.xml:890: The following error occurred while executing this line:

LogPlayLevel: C:\android-sdk-windows\tools\ant\build.xml:902: The following error occurred while executing this line:

These seem to be the lines causing the error