Problematic File Characteristics:
I have identified a specific PDF type that consistently fails to process in the File Search Tool - medical cardiopulmonary stress test reports from hospital systems. Due to data privacy regulations, I cannot share the actual file, but I can provide detailed characteristics that likely contribute to the failure:
-
Complex Mixed Content Structure:
-
Dense multi-column tables with hundreds of rows of numerical data
-
Multiple embedded charts/graphs on the same pages as tabular data
-
Overlapping content layers (text, tables, and vector graphics)
-
-
Special Characters and Encoding:
-
Medical measurement units with special symbols (°C, L/min, mmHg, mL/min/kg)
-
German umlauts (ä, ö, ü) in patient data
-
Mathematical symbols (ø, ², %, )
-
-
High Data Density:
-
5 pages containing over 300 rows of time-series measurement data
-
18+ columns per table with mixed data types (text, integers, floats)
-
Multiple nested header rows
-
-
Embedded Visualizations:
-
15+ line charts showing physiological parameters over time
-
Flow-volume loops
-
Charts with gridlines, legends, and multiple data series
-
Expected Behavior: The File Search Tool should successfully parse, chunk, and index the PDF file, extracting both the tabular data and recognizing the presence of charts.
Actual Behavior: The upload process fails, causing the entire batch upload operation to stall and eventually fail.
Impact: This issue is critical for enterprise use cases where:
-
Users need to upload large document sets containing medical reports, technical specifications, or scientific papers
-
A single problematic file blocks processing of all subsequent files
-
No clear error message indicates which aspect of the file caused the failure
Suspected Root Cause: The File Search Tool’s chunking algorithm likely encounters issues when processing PDFs that contain:
-
Overlapping bounding boxes from tables and embedded graphics
-
Complex text extraction where column boundaries are ambiguous
-
Special Unicode characters that may not be handled correctly during the embedding generation phase
-
Documents where content is rendered as a combination of text objects and vector graphics
Request: If needed, I can provide a sample file that reproduces this issue through a secure channel, but due to the sensitive nature of medical data, I cannot attach it to this public bug report.