raise error on invalid nrm entries (and filter out blank lines from loop)
raise error on invalid nrm entries (and filter out blank lines from loop)

jeroenh/OpenNSA,NORDUnet/opennsa,jeroenh/OpenNSA,NORDUnet/opennsa,jab1982/opennsa,jeroenh/OpenNSA,NORDUnet/opennsa,jab1982/opennsa