# Troubleshooting
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If you run into an error, use the following list to try to troubleshoot the issue. If you need further support, reach out to the SageMaker AI team at sm-smart-sifting-feedback@amazon.com.

**Exceptions from the SageMaker smart sifting library**

Use the following reference of exceptions raised by the SageMaker smart sifting library to troubleshoot errors and identify causes.


| Exception Name | Description | 
| --- | --- | 
| SiftConfigValidationException | Thrown from the SageMaker smart sifting library in case of any missing Config key or unsupported value type for Sift Key | 
| UnsupportedDataFormatException | Thrown from the SageMaker smart sifting library in case of any unsupported DataFormat for Sifting logic | 
| LossImplementationNotProvidedException | Thrown in case of missing or not implementing Loss interface |