The collection report page contains the following information:
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Total Files The total number of files collected the data collection jobs. 
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Extraction Processed Files The total number of documents that were processed for entities in the data collection jobs. 
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Data Collection Failures The percent of data collection jobs that failed. 
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Entity Extraction Failures The percent of documents that failed the entity extraction process. 
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Failures by Type A list of the types of failures present in failed data collection jobs. 
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Failures by Error A list of the errors present in failed data collection jobs. 
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Failures Information A list of the files that failed entity extraction with information about the files, such as the failure reason, the last indexed time, the path, and file size.