AI Gigapixel producing wrong file?

Okay, I’m sure it’s something I don’t understand or doing wrong. I just increased the size of a photo I cropped to 400% increase. It was a TIFF going in and I had set the program to size and produce a JPEG. Looking at the screenshot did I do something wrong? It produced a TIFF.

3 posts were merged into an existing topic: AI GIgapixel outputs wrong size files