Hi William&Nick,

Sorry about that. I believe this issue appears in some cases when updating projects older than 15.h to releases newer than 17.a (when there was a somewhat major update to the way we organize voxel-to-voxel analyses). In general, if you encounter this issue and do not have any voxel-to-voxel analyses defined in your project, or if you can live with simply repeating your existing voxel-to-voxel analyses after the update, then simply typing:

   conn('set','vvAnalyses.regressors',conn_v2v('empty'));
   conn_process denoising_finish;
   conn save;

after loading your project in any of the newer versions of CONN should fix this issue. 

If, on the other hand, you really would prefer to try keeping your existing voxel-to-voxel analyses, that requires a little of manual editing since it all depends a bit on the specificities of your existing project:

   @William: I have gone ahead and done those changes for the conn*.mat file that you provided (the modifications are in the attached file). Please let me know if you still run into any issues. With this you should be able to proceed normally and will still have access to your existing voxel-to-voxel analyses. The only limitation of this approach is that CONN will not allow you to add other/additional voxel-to-voxel analyses to this project

   @Nick and anybody else encountering this same issue: if you prefer to follow this route please send me your conn_*.mat file and I will be happy to take a closer look and make these changes

Best
Alfonso