Error Handling

---
name: xlsx-error-handling
description: 'Sub-skill of xlsx: Error Handling.'
version: 1.1.0
category: data
type: reference
scripts_exempt: true
---

# Error Handling

## Error Handling


### Common Errors


**Error: InvalidFileException**
- Cause: File is not a valid .xlsx (possibly .xls)
- Solution: Convert to .xlsx or use xlrd for .xls files

**Error: Circular reference**
- Cause: Formula references itself
- Solution: Review formula logic and break the cycle

**Error: #REF! in formulas**
- Cause: Cell reference is invalid (deleted row/column)
- Solution: Use named ranges or validate references

**Error: Memory issues with large files**
- Cause: Loading entire file into memory
- Solution: Use `read_only=True` or `write_only=True` mode