Hi,
I've got a problem with the new v4 I/O reading some particular
classes we have. Specifically I've attempted this under v4-00-0{2|3},
and not that it matters but FermiLinux {9.0|7.3}, gcc 3.{3|2}.1.
The basic problem is that we had some classes, say, DataBlock1 and DataBlock2
that derive from DataBlockBase and PureAbstractInterface. All classes
are explicitly instrumented with ClassDef and listed in the LinkDef.h
with a "+". DataBlockBase derives from TObject. But PureAbstractInterface
does not and has ClassDef version=0; the PureAbstractInterface class
doesn't have any data -- it is just interface. The problem is when
reading back files written under v3-05-07 and v4-00-0{2|3} I get:
$ root -b -q read_test.C
[...]
Error in <TBuffer::CheckByteCount>: object of class PureAbstractInterface read too many bytes: 6 instead of 2
Warning in <TBuffer::CheckByteCount>: PureAbstractInterface::Streamer() not in sync with data on file, fix Streamer()
Error in <TBuffer::CheckByteCount>: object of class PureAbstractInterface read too many bytes: 6 instead of 2
Warning in <TBuffer::CheckByteCount>: PureAbstractInterface::Streamer() not in sync with data on file, fix Streamer()
[...]
The data seems to come back in okay, but these messages occur for every
such object read in. How do I make them go away.
Example code/scripts/files are in the attached tar file.
Thanks,
-robert
Robert W. Hatcher | rhatcher@fnal.gov 630-840-3102
FNAL CD/EXP (MINOS) | MS 220, PO Box 500, Batavia IL 60510
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