I have Nintex Forms and Workflows 2013

I am currently having issues copying the the attachments on the Form to a document library it is erroring out.

The workflow is built as:

The error message that I am seeing is:

It is creating the folder correctly but the weird thing is when copying the attachments that errors out it is creating a subfolder called 16

Any ideas on what I am doing wrong and how to get this.. once I have this working I can move onto putting the attachments from all of the flexi-tasks through the workflow