[nant] /home/robl/opensim/OpenGrid.Framework.Data/OpenGrid.Framework.Data.dll.build build

BUILD FAILED

/home/robl/opensim/OpenGrid.Framework.Data/OpenGrid.Framework.Data.dll.build:
Error loading buildfile.
    Could not find file "/home/robl/opensim/OpenGrid.Framework.Data/OpenGrid.Framework.Data.dll.build".