howard_sanford I am using the NIST17.L library, but I am missing the RI-information. When I open my NIST17.L-file (Open library...), there is no RI-information included. Also, RI is not used for matching. The RT match is working just fine with my xml-Library, that I have created myself. Is there something wrong with my NIST17.L-file or is there a trick to get this working?