+ return 0x0;
+ }
+
+ // check chamberId
+ Int_t chamberId = cluster->GetChamberId();
+ if (chamberId < 0 || chamberId >= AliMpConstants::NofTrackingChambers()) {
+ AliError(Form("ChamberId (%d) out of boundaries [0,%d[",chamberId,AliMpConstants::NofTrackingChambers()));
+ return 0x0;