Additional protection: no calculation of the threshold for negative HV

diff --git a/HMPID/AliHMPIDTracker.cxx b/HMPID/AliHMPIDTracker.cxx
index 99cf7a43f5ff155bd7da5467f396f9b66b8d8f44..3ce6008763872b4cab67d33ab9281fb66592831f 100644 (file)
--- a/HMPID/AliHMPIDTracker.cxx
+++ b/HMPID/AliHMPIDTracker.cxx
@@ -111,7 +111,8 @@ Int_t AliHMPIDTracker::Recon(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmea
       qthre=((TF1*)pQthre->At(cham))->Eval(pEsd->GetTimeStamp());                                //
     else {                                                                                       // in the past just 1 qthre
       Int_t hvsec = AliHMPIDParam::InHVSector(yPc);                                              //  per chamber
-      qthre=((TF1*)pQthre->At(6*cham+hvsec))->Eval(pEsd->GetTimeStamp());                        //
+      if (hvsec>=0)
+       qthre=((TF1*)pQthre->At(6*cham+hvsec))->Eval(pEsd->GetTimeStamp());                        //
     }                                                                                            //
     recon.SetImpPC(xPc,yPc);                                                                     //store track impact to PC
     recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(cham),nmean,qthre);                           //search for Cerenkov angle of this track