Hi 
I have several MEG-Recordings from an Elekta-NeuroMag and after some time we decided to not use three channels, because they didn't work anymore. So now I have 313 Channels for some files and 310 for others and I want to process them together. That doesn't work because of the different size.
Simply marking the Channels as BAD didn't work so I thought I need to delete them completly but I didn't know how. The "Standardize > Uniform list of channels" doesn't work and I get the warning "Error: Data type mismacht. Invalid inputs for process: "Uniform list of channels".
I'm also kinda new to Brainstorm and don't know what to do anymore. Could you help me?