Some tools return error log files when processing fails; quality control tools are a good example. The error log file is a simple text file listing data that failed (typically the polyline ID number). An example is shown below
RivEX Error Log
Date: 05 October 2012
RivEX version: 10
Polyline ID field: FID
The following ID's are all polylines that self intersect, review and edit dataset to remove these!
Error log files are stored the ErrorLogs sub-folder in the river network Workspace folder.