Large array size with synfast_flat

[ajcukierman]

When using synfast_flat with a large number of pixels, e.g., 50e4 x 50e4, I encounter a ValueError in _nmtlib.synfast_new_flat that reads negative dimensions are not allowed. The inputs are definitely all positive, and I have no issues with smaller array sizes. The threshold is approximately at 50e4 x 50e4.

[damonge]

Just checking, are these really the dimensions of the maps you're trying to generate? A map this size would take up ~1.8 TB of memory, which makes this very difficult to reproduce.

[ajcukierman]

I'm sorry. I meant 5e4, not 50e4! It should be more like 20 GB. I was able to make a map with 4.3e4 on a side, and I can store it in FITS format with 15 GB.