ROOT::RDF::FromCSV

ROOT
1 
0x00007FFD08414F08 处(位于 CSV.exe 中)有未经处理的异常: Microsoft C++ 异常: std::bad_alloc，位于内存位置 0x000000BCC075F170 处。
Unhandled exception at 0x00007FFD08414F08 (located in CSV.exe) : Microsoft C++ exception: std::bad_alloc, located at memory location 0x000000BCC075F170.

auto fileNameUrl = "http://root.cern.ch/files/tutorials/df014_CsvDataSource_MuRun2010B.csv";
    auto fileName = "df014_CsvDataSource_MuRun2010B_cpp.csv";
    if (gSystem->AccessPathName(fileName))
        TFile::Cp(fileNameUrl, fileName);
      ROOT::RDataFrame df = ROOT::RDF::FromCSV(fileName);
2

Dear @songshusen ,

Thank you for reaching out. I tried your code snippet with no failure on my machine:

root [0] auto fileNameUrl = "http://root.cern.ch/files/tutorials/df014_CsvDataSource_MuRun2010B.csv";
root [1] auto fileName = "df014_CsvDataSource_MuRun2010B_cpp.csv";
root [2] if (gSystem->AccessPathName(fileName)) TFile::Cp(fileNameUrl, fileName);
[TFile::Cp] Total 14.46 MB	|====================| 100.00 % [94.0 MB/s]
root [3] ROOT::RDataFrame df = ROOT::RDF::FromCSV(fileName);
root [4] df.Display()->Print()
Info in <Print>: Only showing 10 columns out of 22

+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| Row | E1        | E2        | Event    | M         | Q1 | Q2 | Run    | Type1 | Type2 | ... | 
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| 0   | 19.171200 | 5.4398400 | 90830792 | 2.7320500 | 1  | 1  | 146436 | "G"   | "T"   | ... | 
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| 1   | 12.943500 | 11.863600 | 90862225 | 3.1025600 | -1 | 1  | 146436 | "G"   | "G"   | ... | 
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| 2   | 12.399900 | 8.5553200 | 90644850 | 9.4114900 | 1  | -1 | 146436 | "G"   | "G"   | ... | 
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| 3   | 17.813200 | 9.4217400 | 90678594 | 7.7470200 | 1  | 1  | 146436 | "G"   | "G"   | ... | 
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| 4   | 7.9566400 | 5.4446700 | 90686690 | 8.6772700 | 1  | -1 | 146436 | "G"   | "T"   | ... | 
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+

Could you be more specific about the error? Aren’t there any other steps to reproduce it?
For instance, I see

Unhandled exception at 0x00007FFD08414F08 (located in CSV.exe)

I am not sure whether this is something wrong with ROOT or with how windows handles CSV. Maybe @bellenot could try out the lines of code I pasted in this post and see if they work on windows?

Cheers,
Vincenzo

3

Same here:

C:\Users\bellenot\rootdev>root
   ------------------------------------------------------------------
  | Welcome to ROOT 6.29/01                        https://root.cern |
  | (c) 1995-2022, The ROOT Team; conception: R. Brun, F. Rademakers |
  | Built for win32 on May 24 2023, 15:16:48                         |
  | From heads/master@v6-29-01-1417-ge6080327f4                      |
  | With MSVC 19.29.30146.0                                          |
  | Try '.help'/'.?', '.demo', '.license', '.credits', '.quit'/'.q'  |
   ------------------------------------------------------------------

root [0] auto fileNameUrl = "http://root.cern.ch/files/tutorials/df014_CsvDataSource_MuRun2010B.csv";
root [1] auto fileName = "df014_CsvDataSource_MuRun2010B_cpp.csv";
root [2] if (gSystem->AccessPathName(fileName)) TFile::Cp(fileNameUrl, fileName);
[TFile::Cp] Total 14.46 MB      |====================| 100.00 % [79.5 MB/s]
root [3] ROOT::RDataFrame df = ROOT::RDF::FromCSV(fileName);
root [4] df.Display()->Print()
Info in <Print>: Only showing 10 columns out of 22

+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| Row | E1        | E2        | Event    | M         | Q1 | Q2 | Run    | Type1 | Type2 | ... |
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| 0   | 19.171200 | 5.4398400 | 90830792 | 2.7320500 | 1  | 1  | 146436 | "G"   | "T"   | ... |
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| 1   | 12.943500 | 11.863600 | 90862225 | 3.1025600 | -1 | 1  | 146436 | "G"   | "G"   | ... |
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| 2   | 12.399900 | 8.5553200 | 90644850 | 9.4114900 | 1  | -1 | 146436 | "G"   | "G"   | ... |
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| 3   | 17.813200 | 9.4217400 | 90678594 | 7.7470200 | 1  | 1  | 146436 | "G"   | "G"   | ... |
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
| 4   | 7.9566400 | 5.4446700 | 90686690 | 8.6772700 | 1  | -1 | 146436 | "G"   | "T"   | ... |
+-----+-----------+-----------+----------+-----------+----+----+--------+-------+-------+-----+
root [5]

So @songshusen, can you tell us how you run your code and with which exact version of ROOT?

4

The version of ROOT I used is v6.28/04.
I run my code on windows with visual studio 2022 and C++17 (and C++20).
@bellenot

5

Hi @songshusen ,

when you run that code somewhere in there someone throws a std::bad_alloc exception. As we cannot reproduce the issue, I can only suggest that you compile that C++ code as a normal C++ program with debug symbols and run it in a debugger to see where the exception is thrown from.

Cheers,
Enrico

6

So you compiled your code with Visual Studio? Please make sure you use the same compilation flags than the ones used to compile ROOT, using root-config --cflags, as shown below:

C:\Users\bellenot>root-config --cflags
 -nologo -Zc:__cplusplus -std:c++17 -MD -GR -EHsc- -W3 -D_WIN32 -O2 -IC:\Users\bellenot\build\release\include
7

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