Problem Uploading Large Pixel-size Images

I have a strange problem uploading images into a gallery. I have a number of images that are 3000 pixels along the longest side and they upload just fine. I tried uploading an image that is 4000 pixels along the longest side and it errors out.

I tried saving the 4000 pixel image at a low quality in photoshop so the physical image size is smaller than the 3000 pixel image and it still errors out.

Basically ...
a 3000 pixel image at 4.21 MB uploads fine
a 4000 pixel image at 652K errors out

So, the error seems to based on the pixel dimensions of the file and not the file size.

Any idea what would cause the problem?

Edited Sun Jan 28, 18 7:33 AM by Paul M

See this on trying to increase the PHP memory limit
https://www.picturespro.com/sytist-manual/articles/issues-uploading-photos/

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That was it! I thought only the file size factored into it. Thanks Tim!

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