[ROOT] 'Streamer is null' error.

From: Patois Yannick (patois@ganil.fr)
Date: Wed Jun 13 2001 - 17:03:07 MEST


Hi rooters,

With latest ROOT version (3.01.05) on linux-ix86, I get the following
error when running a programm:

ERROR, Streamer is null
  OLSiliconData*fSiHits         offset= 72 type=501 [fNhits] Sorted and paired silicon hits

The errors comes from an automatically generated streamer from one 
of my class:

class OLTelescopeData : public TObject
{
public:
  OLTelescopeData (void);
  ~OLTelescopeData(void);
  void SetPlasticData  (const S_plastic_struct *sp);
  void SetSiHits       (OLSiliconData *siData,const int nbHits); 
  
protected:
  // Not written on disk
  double fTeleDist;   //! distance to the telescope in mm
  // Plastic brut data
  Float_t fT [4];
  Float_t fE [4];
  Float_t fEa[4];
  // Silicon with reconstructed data
  Int_t fNhits;
  //  OLSiliconData fSiHitPrv;
  OLSiliconData *fSiHits; //[fNhits] Sorted and paired silicon hits
public:
  ClassDef(OLTelescopeData,1) // half) analysed Telescope data class
};

I try to use the new capabilities of ROOT to automatically generates
streamers for array of objects.

If I uncomment the line //  OLSiliconData fSiHitPrv; and
comment the following one, the programm runs without errors. For me, it
means that the OLSiliconData streamer is OK. So what's wrong ?


Note: OLSiliconData also use an automatic streamer, but is only made of
'simple' data types:

class OLSiliconData : public TObject
{
public:
  OLSiliconData (void);
  ~OLSiliconData(void);
  void Set(const OLSiCluster &cir,const OLSiCluster &rad,const double
teleDist);
  void SetiEiEa(const int iE,const int iEa){fiE=iE;fiEa=iEa;}
  double Phi   (void  ) const {return(fPhi);}
  double Theta (void  ) const {return(fTheta);}
  
private:
  Char_t  fiE,fiEa;    // Plastic hit number
  Float_t dEc,dEr;     // Eloss in Circular and Radial 
  Float_t fTheta,fPhi; // Angle of deviation of the particle
  UChar_t N1c,N1r;     // Numer of hit strips
  Float_t Qloc;        // Quality of localisation
public:
  ClassDef(OLSiliconData,1) // Silicon detector particles data
};


	Yannick



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