@SushmaChidirala Usually, this is how the process would happen :

   (1) Create a Parent case , and attach the empty template in it as a default attached file.

   (2) Once the parent case is created, provide a screen where the user can upload the updated excel file on the screen. Once the file is uploaded , provide a trigger to parse and read the excel file: this can be done best by clicking the Submit button on the screen.

  (3) On the post action of the Flow Action , add validations to validate the excel data. Once checked and confirmed as correct, move into a Utility in the flow, which will Queue the page list (parsed from the Excel) rows into a Queue Processor. The Queue processor, in turn, would create cases for each row. It is assumed that the Queue Processor has already been configured and tested to be working correctly.

 (4) While the child cases are being created, route the main user to a Wait screen, where they are waiting until all the child cases are created. Once the child cases are created, the user will be automatically be routed to a screen where they can see links for each case created , and the user can then click on those links to navigate to the child case.