https://community.esri.com/t5/arcgis-drone2map-questions/issues-with-parallel-processing-in-drone2map/m-p/1699294#M1682 <P>I'm running Drone2Map on a new machine (HP Z8 Fury Tower G5) with 64 cores (no CUDA) and running into issues with parallel processing.</P><P>I'm trying to generate True Orthos for a set of 1,751 images, and the AddRastersToMosaicDataset tool is consistently throwing ERROR 160281: A requested row object could not be located. The log output reveals two further errors:</P><UL><LI>Error: 8004819c: Could not initialize the mosaic dataset's parallel processing engine.</LI><LI>Error: 80048178: Cannot synchronize mosaic dataset items associated with the specified raster type instance. [Name: UAV/UAS; Instance ID: 1]</LI></UL><P>Since the issue seems to be with parallel processing, I've tried reducing the number of CPU threads (I've tried various numbers between 1 and 105). I continue to get the same errors.</P><P>I notice in the log that even when I reduce the number of threads (in both project settings and in the global settings), the AddRastersToMosaicDataset tool doesn't seem to honor that number and always reverts to a parallel processing factor of 50%, which on this machine is 64 threads.</P><P>I'm surprised that I haven't seen previous threads on this issue. Any suggestions would be appreciated!</P><P>&nbsp;</P> Thu, 30 Apr 2026 14:08:11 GMT tribesman2007 2026-04-30T14:08:11Z https://community.esri.com/t5/arcgis-drone2map-questions/issues-with-parallel-processing-in-drone2map/m-p/1699294#M1682 <P>I'm running Drone2Map on a new machine (HP Z8 Fury Tower G5) with 64 cores (no CUDA) and running into issues with parallel processing.</P><P>I'm trying to generate True Orthos for a set of 1,751 images, and the AddRastersToMosaicDataset tool is consistently throwing ERROR 160281: A requested row object could not be located. The log output reveals two further errors:</P><UL><LI>Error: 8004819c: Could not initialize the mosaic dataset's parallel processing engine.</LI><LI>Error: 80048178: Cannot synchronize mosaic dataset items associated with the specified raster type instance. [Name: UAV/UAS; Instance ID: 1]</LI></UL><P>Since the issue seems to be with parallel processing, I've tried reducing the number of CPU threads (I've tried various numbers between 1 and 105). I continue to get the same errors.</P><P>I notice in the log that even when I reduce the number of threads (in both project settings and in the global settings), the AddRastersToMosaicDataset tool doesn't seem to honor that number and always reverts to a parallel processing factor of 50%, which on this machine is 64 threads.</P><P>I'm surprised that I haven't seen previous threads on this issue. Any suggestions would be appreciated!</P><P>&nbsp;</P> Thu, 30 Apr 2026 14:08:11 GMT https://community.esri.com/t5/arcgis-drone2map-questions/issues-with-parallel-processing-in-drone2map/m-p/1699294#M1682 tribesman2007 2026-04-30T14:08:11Z