Dear Petsc developers, I am trying to install Petsc on windows 10 but I have a problem. I installed MS-MPI v8<http://go.microsoft.com/FWLink/p/?LinkID=389556> separately and in the configure options I use --with-mpi-include="/cygdrive/c/Program\ Files\ \(x86\)/Microsoft\ SDKs/MPI/Include" --with-mpi-lib="/cygdrive/c/Program\ Files\ \(x86\)/Microsoft\ SDKs/MPI/Lib/x64/msmpi.lib" But it gives error which says: *************************************************************** ERROR in COMMAND LINE ARGUMENT to ./configure ------------------------------------------------------------------------------- Invalid directory: [/cygdrive/c/Program\ Files\ \(x86\)/Microsoft\ SDKs/MPI/Include for key with-mpi-include How should I solve it? Mohammad