TTree Branch appears empty from Draw(), but not from Scan()

[Wile_E_Coyote]

@vbotta Attach your ROOT file for inspection.

@Axel Maybe the same problem as here (commit waiting for ROOT 6.24/00?):

Problem using Long64_t and "L" type with TBranch

Hello, I’m trying to fill a TBranch with Long64_t variables. If the values are greater than 2147483646 they are converted to 0. I checked that the max value of Long64_t is kMaxLong64 = 9223372036854775807. It seems like Long64_t is an Int_t. Do you have any idea why I am getting such a result? Is there any way to solve this problem? I am using root/v6.14.04-el7-gcc71-py37. Please find attached a very simple macro reproducing the observed results. Thank you a lot for your help! // root …