Hi Olivier,
thanks for answering.
Yes I am compiling h2root (let me know if you need my “configure” command)
The cernlib libraries I’m using are:
cernlib.x86_64 2005-26.fc6
That looks pretty recent to me, and 64 bits.
Is it possible that the h2root stops because the ntuples are created using 32 bit version of hbook, whereas I’m using the 64 version? But on the other hand, I can use my 64 bits paw on those ntuples.
thanks again for your help,
mauri