Hi all, It appears that when bootstrap.py is invoked to update sources then unsurprisingly it doesn't overwrite existing sources if these are more recent, as in someone has modified them and not committed the changes. Occasionally this leads to broken builds. To prevent this from happening would it not be a good idea to change bootstrap.py to default to overwrite any uncommitted changes unless some flag is set on the command line? Rob -- Robert Oeffner, Ph.D. Research Associate, The Read Group Department of Haematology, Cambridge Institute for Medical Research University of Cambridge Cambridge Biomedical Campus Wellcome Trust/MRC Building Hills Road Cambridge CB2 0XY www.cimr.cam.ac.uk/investigators/read/index.html tel: +44(0)1223 763234 mobile: +44(0)7712 887162