I loaded the full geometry and found the following:
root  TGeoNode* node = gGeoManager->FindNode(21.128305435180664,48.875217437744141,-150.0001220703125)
root  node->GetName()
(const char* 0x3e13b99)"DrcPDSensor_1"
It seems a problem of DIRC, then.
Just to be sure, you could try the same with the geoemtry you are using. Ppen the param file, load the rootlogon:
root  .x $VMCWORKDIR/gconfig/rootlogon.C
Open a TBrowser, and click on FairBaseParSet... this should load the geometry. After you can do the "FindNode" putting the coordinates of your crash, as I did, and you should find (hopefuly) the same node name.