TSelector in a Proof session

[atd]

Hello

I’m starting to use Proof. Sorry if the question is too stupid.

I have a TSelector** that currently works as this:

aSelector * myS = (aSelector *)TSelector::GetSelector("aSelector.C+");
myS->public_att1=1
myS->public_att2=2

TChain * chain = new TChain ("myTTree");
chain->AddFile( "aFile.root" );
chain->Process( myS );

But, if I try to start a Proof local session like this,

aSelector * myS = (aSelector *)TSelector::GetSelector("aSelector.C+");
myS->public_att1=1
myS->public_att2=2

TChain * chain = new TChain ("myTTree");
chain->AddFile( "aFile.root" );
    **TProof * myCluster = TProof::Open("","workers=4");**
**    chain->SetProof();**
chain->Process( myS );

An error appear:
Info in TProofLite::SetQueryRunning: starting query: 1
Info in TProofQueryResult::SetRunning: nwrks: 4
Looking up for exact location of files: OK (1 files)
Looking up for exact location of files: OK (1 files)
Info in TPacketizer::TPacketizer: Initial number of workers: 4
Validating files: OK (1 files)
Error in TStreamerInfo::Build: ROOT::Detail::TBranchProxy, unknown type: void* fWhere

The TChain is not processed. I think the TSelector doesn’t initialize the histograms properly. I tried with histograms as global variables (but initialized in slavebegin) and as public attributes of my selector.

Any suggestion will be welcomed.

Regards,
atd
** It was build by TTree::MakeSelector, and I added some public attributes to the selector, and filled the methods slavebeging (initialize histograms), process, terminate (merge histograms).

[ganis]

Hello,

Can you give some more details on what you do inside the selector?
Where do you create the histogram?
Do you add it to the output list?

G Ganis