Dictionary problem when adding a vector of struct to TTree

ROOT
1

Dear experts,
I’m trying to add a vector of struct branch to a ttree. Here is an example: the struct and a vector of it are defined as

[code]struct TS1{
double x;
float y;
int z;
};

typedef std::vector VTS1;[/code]
and I use the following code to add it to TTree: VTS1* vts1 = new VTS1(); t1->Branch("ts1", "std::vector<TS1>", &vts1); I create the dictionaries using rootcint and there is no error in the compiling. But following message appears when I run the executable:

[quote]Warning in TClass::Init: no dictionary for class TS1 is available
Error in TTree::Bronch: Container with no dictionary defined in branch: ts1[/quote]
and the output file seems having the expected number of entries but no real data:

root [0] Attaching file t1.root as _file0... (class TFile *) 0x34666a0 root [1] t1->GetEntries() (Long64_t) 100 root [2] t1->GetListOfBranches()->Print() Collection name='TObjArray', class='TObjArray', size=16 root [3] t1->Show(0) Error in <TTree::Show()>: Cannot read entry 0 (no data read)

What I’m missing? Thanks.

Dongliang

2

You need to load the shared library with your dictionary before you open your root file in an interactive session (and you need to link your executable with this library).

3

Thanks for the suggestion. While trying it, I found I had a typo in my code… and that’s the culprit. There was a warning in the compilation, but I didn’t pay much attention … sorry for the noise.

Dongliang