Cannot load multiple images but not the single one

Operating system:
Slicer version:
Expected behavior:
Actual behavior:

When you don’t have the Single File option checked then the file reader will try to look for patterns of similarly named files (like img1.png, img2.png, img3.png…) and try to assemble a volume. But if the files don’t match, like they are different sizes, then the reader can fail.

I’ve just checked loading of color image sequences in Slicer-4.8.1: loading works correctly if the image files are consistently named and sized, as Steve wrote above.