The source or sink storage path configured in the data flow does not exist, contains illegal path characters, or a dynamic path expression evaluated to an empty or malformed string. The path must be a valid container/folder path accessible to the linked service identity.
Common causes
1The container or folder path in the dataset does not exist in the storage account — the container was deleted, renamed, or the folder was never created
2A dynamic path expression (using pipeline parameters or variables) evaluated to null, empty string, or a path with double slashes or leading slashes
3The path starts with a leading slash when it should be relative — e.g., '/container/folder' instead of 'container/folder'
4A pipeline parameter used in the path was not passed to the pipeline run and defaulted to null
How to fix it
1Check the ADF activity run output for the exact path that was rejected — the error message includes the invalid path string.
2Open the source or sink dataset and verify the file path or folder path is correct and the container or file system exists.
3If using a dynamic path expression, test it in the expression builder to confirm it evaluates to a valid path at runtime.
4Ensure the path does not start with a leading slash when using relative paths, and does not contain double slashes or backslashes.
5Verify the linked service account has access to the path being used — an invalid path error can sometimes mask an access-denied error on the parent container.
Frequently asked questions
How do I test a dynamic path expression before running the pipeline?
Click the expression icon on the path field to open the expression builder and use Preview to evaluate with sample values. Also add a Set Variable activity before the data flow to log the resolved path.
Why does the path work in debug mode but fail in a trigger run?
Debug and trigger runs receive different parameter values. If the path parameter is set manually in debug but absent from the trigger, it defaults to null. Check the trigger definition to ensure all required parameters are provided.
Can the access permissions cause an InvalidPath error?
Sometimes — ADF may surface an access denial as an invalid path if the identity lacks permission to list the container. If the path looks correct but the error persists, verify Storage Blob Data Reader is assigned.
Will downstream Power BI datasets be affected?
Yes — the pipeline fails and no data is read or written at this path. Dependent datasets serve stale figures.