Receive File Over SFTP

Hi,

I have a requirement to receive file over SFTP, which I am able to achieve if I give the correct filename with extension.

But, there is a condition to be checked, where if I don't find a file with the given name, I need to notify the user about it through an email. This I am not able to achieve as the smart node is breaking with below error.

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Problem:  An error occurred in executing an Activity Class.

Details:  Error copying the remote file to disk. See application server log for more details. Error Message: No such file

Recommended Action:  Examine the activity class to correct the error and then resume.

Priority of this problem: High Priority

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Could some one suggest on how to handle this is appreciated.

Thanks in advance!

J. Neelima