Required Blob is missing when preview data of a copy data activity sink dataset

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I am new to Azure. I created a new ADF, pipeline, storage blob account and a copy data activity, the source is from a SQL server table and the sink output is a parquet file. But when I preview the data of my sink dataset, I got an error saying the required blob is missing.

I want to create a directory as well but weather I type in the folder name and file name or using parameters, I still receive the error. If I manually upload a file via the Azure Storage Explorer, the preview will have no issue.

Anyone what I missed?

Thanks for the help.

cheers Albert

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Bhavani On

I created linked service for Azure SQL database and blob storage account and created dataset of SQL database for source:

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Dataset of blob storage for sink:

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When I preview the data by entering file name I got below error:

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I got above error because I am not having that file in my blob storage. In data factory the file will create automatically while debug the pipeline without entering filename. I just gave the file path where my parquet file need save in sink dataset and debug the pipeline, it executed successfully.

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My SQL table is copied to blob storage as parquet file successfully.

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