=== GENERATING 1000 TEST RECORDS ===
Generated 1000 test records
Sample records:
  ID:   1 | Date: 2026-04-23 20:29:03 | Temp: 10°C | Humidity: 95% | Lat: 39.302000 | Lng: 20.920000
  ID:   2 | Date: 2026-03-29 09:54:40 | Temp: -1°C | Humidity: 66% | Lat: 39.719000 | Lng: 21.313000
  ID:   3 | Date: 2026-07-09 07:57:02 | Temp:  5°C | Humidity: 88% | Lat: 39.758000 | Lng: 21.147000

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