Tensorflow summery merge error : Shape [-1,784] has negative dimensions

Question

I am trying to get summary of a training process of the neural net below.

import tensorflow as tf 
import numpy as n         


        

Answer 1

I was also having this problem. Searching around the basic consensus is to check for problems somewhere else in your code.

What fixed it for me was I was doing a sess.run(summary_op) without feeding in data for my placeholders.

Tensorflow seems to be a bit strange with placeholders, often they won't mind you not feeding them if you're trying to evaluate part of the graph that is independent of them. Here though, it did.