Segmentation fault when storing hits using sensitive detectors

[phirippu]

Problem in saving data to NTuple at end of step

Thank you for confirming this. Could you also let me know in which user action (class & method): you create your ntuples you call OpenFile(), Write() and CloseFile() whether you run in multithreaded mode if you run in MT, whether you set ntuple merging on

You have spaces in the tuple name.