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[netcdfgroup] error while loading shared libraries: libnetcdff.so.6: cannot open shared object file: No such file or directory

Dear all,
I am a beginner in compiling codes using netcdf and I am stuck with this problem. Even though my code compiles, when I run it the following message shows up:
./mycode: error while loading shared libraries: libnetcdff.so.6: cannot open shared object file: No such file or directory
However, this library is there and it seems that I have linked the libraries correctly as one can see the output of the ldd command (full output see below): 
username@location:~/path$ ldd ./mycode
    libnetcdff.so.6 => /usr/lib/x86_64-linux-gnu/libnetcdff.so.6 (0x00007fd4356fd000) 

I also added in my bashrc file the following command:
export LD_LIBRARY_PATH="/usr/lib/x86_64-linux-gnu/"

In my makefile I have the following lines:
NETCDF_INCLUDE = $(shell /usr/bin/nc-config --fflags)
NETCDF_LIB =  $(shell /usr/bin/nc-config --flibs)
COMPILER = mpif90
COMPILER_LINKS = -L/usr/lib
Could someone please give me an idea of what to try next? The output of nc-config --all gives: 

username@location:~/path$ nc-config --all


This netCDF 4.4.1.1 has been built with the following features:

  --cc        -> /usr/bin/cc
  --cflags    -> -I/usr/include -I/usr/include/hdf5/serial
  --libs      -> -L/usr/lib/x86_64-linux-gnu -L/usr/lib/x86_64-linux-gnu/hdf5/serial -lnetcdf -lhdf5_hl -lhdf5 -lpthread -lsz -lz -ldl -lm -lcurl 

  --has-c++   -> no
  --cxx       ->

  --has-c++4  -> no
  --cxx4      ->

  --has-fortran-> yes
  --fc        -> gfortran
  --fflags    -> -I/usr/include
  --flibs     -> -L/usr/lib -lnetcdff -fPIE -pie -Wl,-z,relro -Wl,-z,now -lnetcdf -lnetcdf 
  --has-f90   -> no
  --has-f03   -> yes

  --has-dap   -> yes
  --has-nc2   -> yes
  --has-nc4   -> yes
  --has-hdf5  -> yes
  --has-hdf4  -> no
  --has-logging-> yes
  --has-pnetcdf-> no
  --has-szlib -> no

  --prefix    -> /usr
  --includedir-> /usr/include
  --libdir    -> /usr/lib/x86_64-linux-gnu
  --version   -> netCDF 4.4.1.1


username@location:~/path$ ldd ./mycode
    linux-vdso.so.1 (0x00007ffcd43f3000)
    libnetcdff.so.6 => /usr/lib/x86_64-linux-gnu/libnetcdff.so.6 (0x00007fd4356fd000)     libnetcdf.so.11 => /usr/lib/x86_64-linux-gnu/libnetcdf.so.11 (0x00007fd43238e000)     libcurl-gnutls.so.4 => /usr/lib/x86_64-linux-gnu/libcurl-gnutls.so.4 (0x00007fd43210f000)     libmpi_usempif08.so.20 => /usr/lib/x86_64-linux-gnu/libmpi_usempif08.so.20 (0x00007fd431ee0000)     libmpi_usempi_ignore_tkr.so.20 => /usr/lib/x86_64-linux-gnu/libmpi_usempi_ignore_tkr.so.20 (0x00007fd431cda000)     libmpi_mpifh.so.20 => /usr/lib/x86_64-linux-gnu/libmpi_mpifh.so.20 (0x00007fd431a83000)     libmpi.so.20 => /usr/lib/x86_64-linux-gnu/libmpi.so.20 (0x00007fd431790000)     libgfortran.so.3 => /usr/lib/x86_64-linux-gnu/libgfortran.so.3 (0x00007fd43146a000) 
    libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fd431166000)
    libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fd430f4f000)     libquadmath.so.0 => /usr/lib/x86_64-linux-gnu/libquadmath.so.0 (0x00007fd430d10000)     libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fd430af3000) 
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fd430754000)
    libhdf5_serial_hl.so.100 => /usr/lib/x86_64-linux-gnu/libhdf5_serial_hl.so.100 (0x00007fd430530000)     libhdf5_serial.so.100 => /usr/lib/x86_64-linux-gnu/libhdf5_serial.so.100 (0x00007fd42ffc8000) 
    libsz.so.2 => /usr/lib/x86_64-linux-gnu/libsz.so.2 (0x00007fd42fdc5000)
    libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fd42fbab000)
    libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fd42f9a7000)
    libnghttp2.so.14 => /usr/lib/x86_64-linux-gnu/libnghttp2.so.14 (0x00007fd42f781000)     libidn2.so.0 => /usr/lib/x86_64-linux-gnu/libidn2.so.0 (0x00007fd42f55f000)     librtmp.so.1 => /usr/lib/x86_64-linux-gnu/librtmp.so.1 (0x00007fd42f342000)     libssh2.so.1 => /usr/lib/x86_64-linux-gnu/libssh2.so.1 (0x00007fd42f116000)     libpsl.so.5 => /usr/lib/x86_64-linux-gnu/libpsl.so.5 (0x00007fd42ef08000)     libnettle.so.6 => /usr/lib/x86_64-linux-gnu/libnettle.so.6 (0x00007fd42ecd1000)     libgnutls.so.30 => /usr/lib/x86_64-linux-gnu/libgnutls.so.30 (0x00007fd42e938000)     libgssapi_krb5.so.2 => /usr/lib/x86_64-linux-gnu/libgssapi_krb5.so.2 (0x00007fd42e6ed000)     libkrb5.so.3 => /usr/lib/x86_64-linux-gnu/libkrb5.so.3 (0x00007fd42e413000)     libk5crypto.so.3 => /usr/lib/x86_64-linux-gnu/libk5crypto.so.3 (0x00007fd42e1e0000)     libcom_err.so.2 => /lib/x86_64-linux-gnu/libcom_err.so.2 (0x00007fd42dfdc000)     liblber-2.4.so.2 => /usr/lib/x86_64-linux-gnu/liblber-2.4.so.2 (0x00007fd42ddcd000)     libldap_r-2.4.so.2 => /usr/lib/x86_64-linux-gnu/libldap_r-2.4.so.2 (0x00007fd42db7c000) 
    librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fd42d974000)
    libutil.so.1 => /lib/x86_64-linux-gnu/libutil.so.1 (0x00007fd42d771000)
    libhwloc.so.5 => /usr/lib/x86_64-linux-gnu/libhwloc.so.5 (0x00007fd42d535000)     libopen-pal.so.20 => /usr/lib/x86_64-linux-gnu/libopen-pal.so.20 (0x00007fd42d283000)     libopen-rte.so.20 => /usr/lib/x86_64-linux-gnu/libopen-rte.so.20 (0x00007fd42cff8000) 
    /lib64/ld-linux-x86-64.so.2 (0x00007fd435d94000)
    libaec.so.0 => /usr/lib/x86_64-linux-gnu/libaec.so.0 (0x00007fd42cdf0000)     libunistring.so.0 => /usr/lib/x86_64-linux-gnu/libunistring.so.0 (0x00007fd42cad9000)     libhogweed.so.4 => /usr/lib/x86_64-linux-gnu/libhogweed.so.4 (0x00007fd42c8a4000)     libgmp.so.10 => /usr/lib/x86_64-linux-gnu/libgmp.so.10 (0x00007fd42c621000)     libgcrypt.so.20 => /lib/x86_64-linux-gnu/libgcrypt.so.20 (0x00007fd42c311000)     libp11-kit.so.0 => /usr/lib/x86_64-linux-gnu/libp11-kit.so.0 (0x00007fd42c0ac000) 
    libidn.so.11 => /lib/x86_64-linux-gnu/libidn.so.11 (0x00007fd42be78000)
    libtasn1.so.6 => /usr/lib/x86_64-linux-gnu/libtasn1.so.6 (0x00007fd42bc65000)     libkrb5support.so.0 => /usr/lib/x86_64-linux-gnu/libkrb5support.so.0 (0x00007fd42ba59000)     libkeyutils.so.1 => /lib/x86_64-linux-gnu/libkeyutils.so.1 (0x00007fd42b855000)     libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007fd42b63e000)     libsasl2.so.2 => /usr/lib/x86_64-linux-gnu/libsasl2.so.2 (0x00007fd42b423000)     libnuma.so.1 => /usr/lib/x86_64-linux-gnu/libnuma.so.1 (0x00007fd42b218000)     libltdl.so.7 => /usr/lib/x86_64-linux-gnu/libltdl.so.7 (0x00007fd42b00e000)     libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0 (0x00007fd42adfa000)     libffi.so.6 => /usr/lib/x86_64-linux-gnu/libffi.so.6 (0x00007fd42abf1000)
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