Hi @mohammad_abu-rezeq9JDA4 ,
Most likely the reconstruction failed. There could be various reasons for failure such as images not being taken properly or not having enough overlaps between images or with Go Pro, too much distortion, etc.
Possible to PM me your project name? Also if possible if you could share your dataset with me I can take a look.
Thanking You.
Warmest Regards,
Rishov Barman
Reality Capture