My comment relates to this sentence:
1) to fail the package if the file is not available, then execute the package again at a later time, or 2) we can wait for the file to be ready. EDIT- I have reconfigured the final sentence of this paragraph, as it was previously very hard to understand. Confirmation needed that my interpretation is correct
There is no need to fail the package if the file is not present. You have the option of using a Foreach container to process the file if it exists, otherwise complete the package successfully. You may also need to set delay validation to true on the file connection (can't remember for sure - haven't done this for a while).
It also seems that I am an SSIS purist :-)
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