Fixing format errors when converting RPT (Report) files to CSV using Python utilities like rpt2csv usually requires adjusting column slice boundaries, character encodings, or string delimiter escapes. Because RPT files are plain-text, fixed-width spaces or tab-separated reports generated by programs like MSC Patran or SQL Server Management Studio (SSMS), standard Python scripts easily break if formatting defaults drift. 1. Adjust Fixed-Width Slice Parameters
If you are using the Patran rpt2csv utility, column parsing will break if data fields overlap or shift. The Cause: The tool slices text based on hardcoded indices.
The Fix: Explicitly pass custom character index slices using the -s or –slice argument.
Example: Use python rpt2csv.py input.rpt -o output.csv -s -31:15 to shift the boundary markers by specific character offsets. 2. Force UTF-8 Encoding Overrides
Garbled characters (such as é) or decoding script failures mean the source RPT file uses a local system encoding instead of standard unicode.
The Cause: The underlying script defaults to system encoding, which misinterprets source data flags.
The Fix: Open the file in a modern text editor and save it as UTF-8 before running the converter.
Alternative: If using an automated multi-file directory tool like the Medium Python rpt2csv template, modify the open() statement inside the python script to explicitly demand encoding:open(filepath, mode=‘r’, encoding=‘utf-8’). 3. Handle Embedded Commas and Quotation Marks
If your output columns look completely shifted or text wraps into the wrong spreadsheet boxes, the converter is failing to manage internal symbols.
The Cause: Data strings containing literal commas or quotation marks trick spreadsheet software into ending rows or columns early.
The Fix: Ensure your python script uses the native csv module with csv.QUOTE_MINIMAL or csv.QUOTE_ALL enabled. This automatically wraps text fields in double quotes. If the text contains literal quotes, the module will escape them with a secondary double quote (””). 4. Correcting Microsoft Excel Import Display Errors
Frequently, the rpt2csv tool creates a completely accurate file, but Microsoft Excel misinterprets the formatting upon open. Common CSV Import Errors and Fixes – Adalo