Error in <TStreamerInfo::WriteBuffer>

ROOT
1

Dear Rooters

Currently, I am testing my GUI Application and sometimes I get errors
which are sorrowly not reproducible. At the moment I got the following error:
When importing a certain textfile as tree I got the following error repeatedly,
I had to kill my application:

Error in <TStreamerInfo>: The element XGCCell::fNPixels type 203 (Int_t) is not supported yet

Error in <TStreamerInfo>: The element XGCCell::fNPixels type 203 (Int_t) is not supported yet

// and so on

Error in <TStreame
[1]+  Terminated              ./XPSApp

Class XGCCell has following elements:

class XGCCell: public XPosition {

   protected:
      Double32_t fInten;
      Double32_t fStdev;
      Short_t    fNPixels;

   public:
};

Repeating exactly the same steps again let me import the data w/o any problems.
What does this error mean and what might be the reason for it?

Best regards
Christian

2

Christian,

Please send the shortest possible setup reproducing this problem.

Rene

3

Dear Rene

As I said, sorrowly the problem is completely irreproducible!
I can try it 50-100 times w/o any problem, but suddenly it appears.

My question is:
1, What does this error message mean, i.e. what is not supported yet?
2, Based on the error message and your experience can you give me a
hint what might be the reason and where I could look?

Best regards
Christian

4

Are you sure that you do not have a member declaration like
Double_t *fXXXXXXXX; //[fNpixels]

If yes, note that the index in [] must be an integer, not a short.

Rene

5

Dear Rene

Thank you for this tip, I will recheck my code.
In order to reduce the size of the trees saved in TFile, I have changed all
entries from Double_t to Double32_t and from Int_t to Short_t.

Best regards
Christian