Use rootn.exe instead of root.exe
Rene Brun
On Mon, 29 Oct 2001, 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
>
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