G4Scheduler Error

when running the code with Radionuclide decay, the following message is displayed on the terminal screen. Thank you for your help, how to fix this error.

G4Scheduler: I stop because the current main list of tracks is empty

This is because the event does not make any chemical species. it is not an error. Can you give more info of your simulation setup ? It is nice to test chemistry with Radionuclide decay.

Hi, @ngoc
Thank you for your valuable advice.