Initial data checks on data file during import to storage to indicate errors eg. null values for mandatory fields or fields that require unique values like customer id which could cause jobs to fail. Please give clear error messages so the user can correct the errors and indicate which records have the error.
For each web app there might be different requirements for the file in storage. Eg. Validation does not need region to be filled in. In Duplicate matching, region is needed and if empty, the job will fail.
Indicate for each web app, fields that are required or cannot be empty or must contain unique values.
Thank you.