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I got the same errors after change the .soft as you suggested.

After some more tests, I found a strange behavior. Here is my test program. % cat test.f program main include "mpif.h" include "pnetcdf.inc"

 integer ierr, ncid
 call MPI_Init(ierr)
 ierr = nfmpi_create(MPI_COMM_WORLD, "pnf_test.nc", NF_CLOBBER,
+                    MPI_INFO_NULL, ncid)

 ierr = nfmpi_enddef(ncid)

 ierr = nfmpi_close(ncid)
 call MPI_Finalize  (ierr)
 end program

Here is my compile command and it generated no error. % /soft/compilers/wrappers/gcc/mpif77 -I../../src/libf test.f -o test -L../../src/lib -lpnetcdf

However, once I removed the line of ierr = nfmpi_enddef(ncid)

the errors appeared: /soft/perftools/darshan/darshan-2.2.7/lib/libdarshan-mpi-io.a(darshan-pnetcdf.o): In function __wrap_ncmpi_close': /soft/perftools/darshan/darshan-2.2.7/build/darshan-2.2.7/darshan-runtime/lib/darshan-pnetcdf.c:152: undefined reference to ncmpi_close' /soft/perftools/darshan/darshan-2.2.7/lib/libdarshan-mpi-io.a(darshan-pnetcdf.o): In function __wrap_ncmpi_open': /soft/perftools/darshan/darshan-2.2.7/build/darshan-2.2.7/darshan-runtime/lib/darshan-pnetcdf.c:108: undefined reference to ncmpi_open' /soft/perftools/darshan/darshan-2.2.7/lib/libdarshan-mpi-io.a(darshan-pnetcdf.o): In function __wrap_ncmpi_create': /soft/perftools/darshan/darshan-2.2.7/build/darshan-2.2.7/darshan-runtime/lib/darshan-pnetcdf.c:62: undefined reference to ncmpi_create' collect2: ld returned 1 exit status

I guess the mpi compiler wrapper fails to place the user command-line library (-L../../src/lib -lpnetcdf in this case) after the internal libraries used by Darshan.

(via Ray)