=== GENERATING 1000 TEST RECORDS ===
Generated 1000 test records
Sample records:
  ID:   1 | Date: 2025-12-08 15:27:38 | Temp: 32°C | Humidity: 33% | Lat: 39.184000 | Lng: 20.741000
  ID:   2 | Date: 2025-10-02 19:55:24 | Temp: 30°C | Humidity: 39% | Lat: 39.532000 | Lng: 21.055000
  ID:   3 | Date: 2026-04-29 01:32:09 | Temp: 10°C | Humidity: 58% | Lat: 39.495000 | Lng: 20.618000

=== TESTING WRITE OPERATIONS ===
ERROR: Cannot write CSV file