Blank histogram using PROOF

[rbraid]

Hello, could someone please help me with a small issue?

I am running Root 5.34/04 (the most current as far as I know) and I have some code that runs fine in a single core manner, but when I invoke Proof, it no longer writes. By various iterations I can get the code in a state where it at least writes my output file but the test histogram is empty.

I am sure I am doing something wrong, but with no formal training on parallelizing code, I hope someone more knowledgable will point out what I am doing wrong. I just want to get my test histogram working properly.

Attached is everything required to reproduce the issue, in a minimal form. Go to the directory and type "root -l multrun.C"

EDIT: My data .root file isn't uploading. Does this board have attachment size limits?
EDIT2: I have uploaded the file here: inside.mines.edu/~rbraid/asm20698.root