Reconstruction failed Error with HelloPhotogrammetry

I'm trying to create a USDZ object with the tutorial from Apple Creating 3D Objects from Photographs. I'm using the new PhotogrammetrySession within this sample project: Photogrammetry Command-Line App.

That's the code:

let inputFolderUrl = URL(fileURLWithPath: "/tmp/MyInputImages/")
let url = URL(fileURLWithPath: "MyObject.usdz")
var request = PhotogrammetrySession.Request.modelFile(url: url, 
                                                      detail: .full)
guard let session = try PhotogrammetrySession(input: inputFolderUrl) else {
    return 
    } 

I'm getting the following error:

2021-06-12 21:53:56.968490+0200 HelloPhotogrammetry[15294:190841] ERROR cv3dapi.pg: Internal codes (1): 4011
2021-06-12 21:53:56.972113+0200 HelloPhotogrammetry[15294:190841] [Photogrammetry] No SfM map found in native output!
2021-06-12 21:53:56.972909+0200 HelloPhotogrammetry[15294:190841] [Photogrammetry] Got error in completion: reconstructionFailed(RealityFoundation.PhotogrammetrySession.Request.modelFile(url: OutputAR.usdz -- file:///Users/jonasdeichelmann/Library/Developer/Xcode/DerivedData/HelloPhotogrammetry-ghttmmgcrrhywqeebbrstrvxoikh/Build/Products/Debug/, detail: RealityFoundation.PhotogrammetrySession.Request.Detail.medium, geometry: nil), "Reconstruction failed!")
Request modelFile(url: OutputAR.usdz -- file:///Users/jonasdeichelmann/Library/Developer/Xcode/DerivedData/HelloPhotogrammetry-ghttmmgcrrhywqeebbrstrvxoikh/Build/Products/Debug/, detail: RealityFoundation.PhotogrammetrySession.Request.Detail.medium, geometry: nil) had an error: reconstructionFailed("Reconstruction failed!")
Processing is complete!

I'm using an M1 iMac with macOS Monterey 12.0 Beta (21A5248p) and Xcode 13.0 beta (13A5154h).

tl;dr: Try another set of images, probably there is something wrong with your set of images.

I've had it work successfully except in one instance, and I received the same error that you are getting. I think for some reason it didn't like the set of photos I took for that particular object. You could try taking just a few photos of another simple object and try again and see if that is the problem with your first run.