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4.3 Common Issues

Offices already utilizing the calibration application noted two common issues. Try these suggestions if you have failed calibration runs at your office.

DataSymptom: Missing MAPE, temperature, or RAIM data

Potential Causes:

Did you run the preprocessing steps for the forecast group or segment?

Is the imported data expired?

Solution

  • Run the preprocessing workflow.
  • Re-import the historical data.
  • Before the newly imported historical data expires, start CHPS without the Rolling Barrel. This prevents the system from deleting expired data.

Best Practices

Troubleshoot run errors using the Manual Forecasts tab.

Run hydrologic models in debug mode to write cold state files to the /tmp directory.

Symptom: Simulation runs failing

Cause: Memory limits exceeded

Solutions

  • Delete the local data store, and re-import historical data.
  • Ask the CHPS System Manager guidance on running CHPS with more memory.
  • Tell the Configuration Focal Point about the issues. The preprocessing steps and simulation steps may need to be separated.
  • Consider running large forecast groups on different calibration Stand Alones.