# Troubleshooting

# Common Problems

Problem | Most Common Reasons
--- | ---
Can't retrieve Study List over DICOMWeb | 1. QIDO root URL is incorrect 2. DICOM Web is not enabled on PACS
Can't retrieve images | 1. WADO Root URL is incorrect 2. DICOM Web is not enabled on PACS 3. HTTP Basic Authentication username and password are incorrect or not provided.

# Debugging Steps

### Can't retrieve Study List over DICOMWeb

1. Check that you can query your PACS using an alternative DICOM Web client (e.g. cURL, or a Web Browser). If you cannot, then your PACS is configured incorrectly. Refer to the documentation of the image archive.

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