How long could the function argument list be?

ROOT
1

Hi,
I have a very long argument list for a function, but it seems root can not handle it. I am using ROOT_LEVEL : 3.10.01.

QAInfo:You are using STAR_LEVEL : SL04e, ROOT_LEVEL : 3.10.01 and node : rcas6016.rcf.bnl.gov
root4star [0]
Processing /star/u/wjdong/wrk/.h/dev/new/ElectronFlow.C(999999,"/star/data05/scratch/wjdong/temp4new/RUN5090038/RUN5090038.10.list","/star/data05/scratch/wjdong/temp4new/RUN5090038/RUN5090038.10.hist.root","/star/data05/scratch/wjdong/temp4new/RUN5090038/RUN5090038.10.phiWgt.root","/star/data05/scratch/wjdong/temp4new/RUN5090038/RUN5090038.10.ntuple.root","/star/data05/scratch/wjdong/temp4new/RUN5090038/RUN5090038.10.adc2e.root","/star/data05/scratch/wjdong/temp4new/RUN5090038/RUN5090038.10.ptmaker.root",false)…

*** Break *** segmentation violation
Root > Segmentation fault

I can use some trick to avoid this, but I am just curious about some other options.
Thanks.
Weijiang

2

In version 3.10, the limit for the string in the root command line
was 512 characters. It has been extended to 2048 in version 4.
Note that this is anyhow a false problem as I am sure somebody one day
will request an extension to 6 miliion characters.
You should use a TChain instead of this list of files in input.

Rene

3

Hi Brun,
Thanks. Actually I was using the TChain more or less. I just have too many output files, and each of them carries the full path. Now, I used a little trick to deal with it.