if I had to have a wild guess it looks like you've updated the SRS binaries from 7.1.3 to 188.8.131.52. If you're using EMBL as a virtual library then what is likely to have happened is that emblnew has been indexed using the 184.108.40.206 binaries and emblrelease has been indexed using the 7.1.3 binaries. Unfortunately, because of a efw bugs that were fixed between the two versions this creates incompatible indices and the creation of the EMBL virtual library fails due to the differing index types. There are 2 solutions, roll back to 7.1.3 binaries, re-index emblnew and then recreate the embl virtual library sortsets and links, or, solution 2, is to re-index emblrelease using the 220.127.116.11 binaries and do it that way. As embl release 80 has been recently released, you might want to do what I did and migrate to that now and index both emblrelease and emblnew using the srs18.104.22.168 binaries.
hope that helps
Computational Biology Group - User Support
John Innes Centre