What you see is not related to MAXNEL otherwise genmap would bail out with an error message.  On 7 Nov 2018, at 19:01, nek5000-users--- via Nek5000-users <[email protected] <mailto:[email protected]> > wrote: Hi! Maybe you should increase MAXNEL parameter in maketools script (Nek5000/tools)? nek5000-users <[email protected] <mailto:[email protected]> >: Hello, I created a ".re2" mesh by converting an Exodus (".exo") mesh from Cubit 15.0 using the "exo2nek" script. It's a relatively large mesh (780k elements) and I need to run it using parallel processing, and so I wanted to use the "genmap" script. However, I keep getting these errors, no matter what input mesh tolerance value I use, from 0.2 to 0.00001): genmap Input .rea / .re2 name: RCF_3D_FullSimple   reading RCF_3D_FullSimple.re2 Input mesh tolerance (default 0.2): NOTE: smaller is better, but generous is more forgiving for bad meshes. 0.00001   reading mesh data ...   start locglob_lexico: 8 775728 6205824 1.0000000000000001E-005   locglob: 1 1 6205824   locglob: 2 11290 6205824   locglob: 3 15413 6205824   locglob: 1 632909 6205824   locglob: 2 632909 6205824   locglob: 3 632909 6205824   locglob: 1 632909 6205824   locglob: 2 632909 6205824   locglob: 3 632909 6205824 593741 2 4 Matrix: SELF!!         1 SELF!! 313837 313837 313837 313837         2 SELF!! 313837 313837 313837 313837   cont: SELF!! 593741   ABORT: SELF-CHK 1 2 593741 0   Try to tighten the mesh tolerance!             0 quit Do you have any idea what this means? Just from the output, it looks like it's saying there are coincident vertices or elements? Is it a problem with my mesh or with running the script? Thanks, Matt _______________________________________________ Nek5000-users mailing list [email protected] <mailto:[email protected]> https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users _______________________________________________ Nek5000-users mailing list [email protected] <mailto:[email protected]> https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users