Dear Jens, thanks for your reply. I had tried running my experiment locally and it crashed (due to a sound file issue explained here: Emotiv Local Experiment is crashing - #7 by ogi). So I was looking for some alternatives for running my experiment via EmotivBuilder. Then I faced this marker issue on EmotivBuilder, and thought Pavlovia could be a solution. However, I was informed that Emotiv markers are not compatible with EmotivBuilder (i.e. when you upload the PsychoPy file to EmotivBuilder). Eventually I managed to solve the problem with the sound file, and I could run the experiment locally.