<TKey::ReadObj>: Incorrect detection of the inheritanc

ROOT
1

When my very simple class is attempted to be read, I get the above message:

Fatal in TKey::ReadObj: Incorrect detection of the inheritance from TObject for class SctArchiving::RootInteger

Can you help?

The class appears in the TClassList
class version bits initialized

SctArchiving::RootInteger 1 0 Yes

main looks like:

#include “…/src/primitives/RootInteger.cpp”
#include “TFile.h”
#include “TClassTable.h”
#include

using SctArchiving::RootInteger;

int main(){
{
TFile f (“blah.root”,“UPDATE”);
SctArchiving::RootInteger i(3);
i.Write(“myob”);
f.Close();
}

gClassTable->Print();

{
TFile g (“blah.root”,“READ”);
gDirectory->pwd();
gDirectory->ls();
RootInteger* i = (RootInteger*) g.FindObjectAny(“myob”);
std::cout << “PTR=” << i << std::endl;
std::cout << “VAL=” << *i << std::endl;
}
}

RootInteger looks like:
#ifndef SCTARCHIVING_ROOTINTEGER_H
#define SCTARCHIVING_ROOTINTEGER_H
#include “TObject.h”

namespace SctArchiving{
class RootInteger : public TObject{
public:
RootInteger() : value(0) {;}
RootInteger(int val) : value(val) {;}
void operator= (const RootInteger& rhs) {value=rhs.value;}
virtual char* GetClassName(){return “SctArchiving::RootInteger”;}
operator int(){ return value;}
virtual ~RootInteger();
private:
int value;
ClassDef(RootInteger,1);
};
}
#endif

RootInteger.cpp looks like:

#include "RootInteger.h"
SctArchiving::RootInteger::~RootInteger() {}
ClassImp(SctArchiving::RootInteger)

The LinkDef file looks like:

#ifdef CINT
#pragma link off all globals;
#pragma link off all classes;
#pragma link off all functions;
#pragma link C++ namespace SctArchiving;
#pragma link C++ class SctArchiving::RootInteger;
#endif

2

Hi,

I am unable to reproduce this problem.
Which version of ROOT are you using?
What are you really running (your main is slighty incorrect).

Cheers,
Philippe.

3

Here is an attachment with the tarred gzipped files I was using.
gcc 3.2.3 and root 3.05/07
ajb57_root.tar.gz (1.01 KB)

4

Hi,

Note that the problem was first diagnosed during the writing pahse:[quote]Error in TClass::BuildRealData: can not find any ShowMembers function for SctArchiving::RootInteger![/quote]
The problem was in your linkdef file where you need to add a request to link nested class. Use the following linkdef file:#ifdef __CINT__ #pragma link C++ nestedclasses; #pragma link C++ namespace SctArchiving; #pragma link C++ class SctArchiving::RootInteger+; #endif

Cheers,
Philippe.