Thanks, Robert! I had found that description, but it doesn't explain exactly how to alter the limit. It says "If possible, increase the cutoff that affects the number of network edge source features." I was hoping that means I can keep all of the barriers by raising the limit above 500, perhaps using the override function. I just don't know what language to use in the override function, or if that's a way to alter the limit.
The other option of cutting the number of barriers to 500 will not work for my analysis, unfortunately, so raising the limit is the only way to proceed.