The h2root conversion program has to cope with several pathological
cases:
- Hbook files written with different versions of Packlib/Zebra.
New files are identified with 7 works per key. Old files had
only 4.
- Files written on VMS systems with versions of Packlib that I
cannot identify.
- Hbook files not correctly closed. I implemented a pedestrian way
to recover such files. However, the recovery is not always
possible (case of job time-limit or disk-quota).
- Files with more than one ntuple in case the Hbook ntuple header
was saved more than once in the file (Hbook Autosave).
- Case of large Hbook ntuples exceeding the limit of 64K keys.
Hbook itself was able to recover from this situation, but there
are may be still a few cases not considered. Most of these cases
should be correctly recovered. In particular, if you get the result
of TTree::Print at the end of the conversion process, things should
be OK.
I decided to keep the warning message when one of the 5 above cases
has been identified. In your case, the conversion should be OK.
I have one or two cases of problems not correctly processed that
I am currently investigating.
Rene Brun
*...........................................................................
> .......*
> *Branch :Lp_jet : Lp_jet[Npjet]/I
> *
> *Entries : 10 : Total Size = 0 bytes File Size = 0
> bytes *
> *Baskets : 0 : Basket Size = 8000 bytes Compression= 1.00
> *
> *...........................................................................
> .......*
> Found nasty Hbook case!! You had an Hbook error message
> when creating the file (too many records)
> Hbook file should have been created with a bigger LRECL
> ROOT will try to recover
> TFile Writing Name=upgrade.root Title=HBOOK file: upgrade.hst4 converted to
> ROOT
> TFile** upgrade.root HBOOK file: upgrade.hst4 converted to ROOT
> TFile* upgrade.root HBOOK file: upgrade.hst4 converted to ROOT
> KEY: TTree h1;1