Merging with Letswave without error but no improvement

Hi Guys,

I'm currently running the Letswave toolbox into Matlab. The data that I'm running are CWT data from EEG that consists out of 4 participants and 18 epoch, this data I try to merge into 1 dataset. But after 5 hours the program is still running without visible change. In my earlier experience the merging took less than half an hour. I didn't got an error so I have no clue what the porblem is.

Can someone help me fix this problem?

Best wishes, Elles