# Troubleshooting
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This section covers common issues you might encounter when working with CloudWatch pipelines and their solutions.

**Pipeline creation failures**
+ **Issue:** Pipeline creation fails with permission errors

  **Solution:** Verify that your IAM role has the required PassRole permissions for any roles specified in the pipeline configuration
+ **Issue:** Configuration validation errors

  **Solution:** Use the ValidateTelemetryPipeline API to check your configuration syntax before creating the pipeline
+ **Issue:** Log source not available to select

  **Possible reason:** There is already a log source with the same data source name and type. Duplicate combinations are greyed out since you can only create one of each.

**Data processing issues**
+ **Issue:** No data flowing through pipeline

  **Solution:** Check that your data source is properly configured and generating data, and verify that CloudWatch Logs resource policies are correctly set
+ **Issue:** Processor errors in pipeline

  **Solution:** Review processor configuration and ensure input data format matches processor expectations