Error with .e57 panorama generation: 'Scan is too small'

Issue description

When uploading an .e57 without an image, IVION will attempt to generate a panorama. However, it won't be able to if certain conditions are not met. 

Error: "Scan is too small"

If IVION detects that a generated panorama will not be at least 512x512 pixels in size, it will not generate a panorama and will display the error "Scan is too small". This information is read from the .e57 scan header. First, it tries to read from the index bounds max and min; if that is missing, it reads from the spherical image width/height. This information can be checked in CloudCompare.

This solution applies to IVION.

Troubleshooting procedure

1. Attempt to export the .e57 including images, so that IVION can import the panoramas taken by the scanner directly.