Error in <FillNtupleFromStream>: only whitespace and new line can follow the last number on the line

Newbie
1

Dear all,
I get the error I have indicated in the subject when using TNtuple::ReadFile.
Here is what I am doing:

root [0] TNtuple nt("nt","","%d %d %d %f")
root [1] nt.ReadFile("Potential_map.txt")

and I get:

Error in : only whitespace and new line can follow the last number on the line
(long long) 0

In attachment you can find the txt file I am trying to read. I have created it using python; both the python script and the root session are run in Linux/OSX machine but the error is
always the same. In attachment the

Potential_map.txt
filePotential_map.txt (1.2 KB)

Any help will be greatly appreciated.

Best regards,
Marco Bomben

2 
{
  TTree *t = new TTree("t", "my tree");
  t->ReadFile("Potential_map.txt", "i/I:j:k:v/F");
  t->Print();
}
3

Thanks a lot Wile E Coyote!
Could you please tell me why the code based on TNtuple was not working?
Otherwise the topic can be closed.
Thanks again and kind regards,
Marco Bomben