Error in <TNetXNGFile::Open>: [FATAL] Connection error

ROOT
1

Hi,

While I run a code to skim my data (applying some initial cuts), I find this in the log file:

...
Add file_j.root to TChains
Add file_k.root to TChains
Add file_l.root to TChains
Add file_m.root to TChainsError in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Error in <TNetXNGFile::Open>: [FATAL] Connection error
Add file_n.root to TChains
Add file_o.root to TChains
...

The input and output, both seem to be all right but this error keeps occurring at different points in the log files on re-running the code and I would like to understand it. Can someone please tell me what could be a possible cause for this error and tell me if this can lead to any unseen errors in my results?

Cheers,
Ruina

2

Hi,
that’s a network error when reading files over the internet. It might lead to parts of the input dataset being skipped when processing them, or (I think) to the processing be interrupted altogether depending on your code.

Cheers,
Enrico

3

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