TTree larger than 100Gb error while merging files

Hello,

When I am using hadd to merge all my root files, I encounter this error:

Output file of the TFile Merger (targeting results.xRay.root) has been deleted (likely due to a TTree larger than 100Gb)

Aborted

_ROOT Version:6.26.06
_Platform:ComputeCanadaClusters
_Compiler:gcc/9.3.0

In you current directory try again after creating a file name rootlogon.C containing:

{
    TTree::SetMaxTreeSize(TTree::kMaxEntries);
}

Thanks I will try that!

Cheers