I had 'task failed(returned : 273956867) & Failed during Photos pairwise matching' when submit production.
Please submit a service request (https://connect.bentley.com) and include a log file for the failed task for technical support.:
https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/27875/export-logfile-for-technical-support
DGR_sea_lv_40GB_Production_1 - Tile_10.zip
Answer Verified By: Kim Dongkyun 김동균