Hi RObert,
the TMapFile functionality requires linking with libNew. We don't
link the default root anymore with this lib, but for backward compatibility
provide an exutable rootn.exe in $ROOTSYS/bin which has been linked with
libNew. Of course you can still link any of your own apps with libNew.
The TMapFile functionality has not been deprecated.
Cheers, Fons.
Robert Michaels wrote:
>
> Using root 3.01-06 on Redhat 6.2 Linux with kernel 2.2.19-6.2.7,
> but my problem is observed on SunOS also, and disappears with a
> sufficiently early version of root (e.g. 2.23-12).
>
> I am having trouble using TMapFile. I used the example
> producer from http://root.cern.ch/root/html/examples/hprod.C.html
> and in the second line it fails:
>
> {
> gROOT->Reset();
> mfile = TMapFile::Create("hsimple.map","RECREATE", 100000,
> "Demo memory mapped file with histograms");
> // Script dies here.
> }
>
> The error message:
> Error in <TMapFile::TMapFile>: no memory mapped file capability available
> Error in <TMapFile::TMapFile>: mapped file not in mmalloc format or
> already open in RW mode by another process
>
> (To anticipate: I did remove the file "hsimple.map" first.)
>
> Interestingly, if I use root 2.23-12 or 2.21-08 the tutorial producer
> works great, and the tutorial consumer sees the data, etc. So, my
> question is what might be wrong with my use under 3.01-06 ? (problem
> also on 3.00-06). It seems unlikely to be a corrupted installation
> since I tried both my installed version and our computer center's
> version. Same failure is seen on a SunOS installation.
>
> thanks,
> ------------------------------------------------------
> Robert W. Michaels
> www.jlab.org/~rom
> phone (757) 269 7410 pager (757) 881 7897
> Thomas Jefferson National Accelerator Facility
> 12000 Jefferson Ave, Newport News, VA 23606 USA
--
Org: CERN, European Laboratory for Particle Physics.
Mail: 1211 Geneve 23, Switzerland
E-Mail: Fons.Rademakers@cern.ch Phone: +41 22 7679248
WWW: http://root.cern.ch/~rdm/ Fax: +41 22 7679480
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