The ch3:nemesis:ib device is not supported anymore. Please use ch4:ucx for Mellanox IB networks. Sent from my iPhone On Jul 11, 2020, at 10:22 AM, Sabu Best via discuss <[email protected]> wrote:  Good morning, While trying to configure MPICH for inifiniband we got the following error /configure --prefix=$DIR/mpich --with-device=ch3:nemesis:ib . . . . checking for signal.h... yes checking for signal... yes configure: error: Network module ib is unknown "./src/mpid/ch3/channels/nemesis/netmod/ib" Any suggestions anyone? _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss