How can I copy a Document to another Document library and maintain Versioning?

Hi Emily.  These links might help:

http://vadimtabakman.com/nintex-workflow-move-documents-and-preserve-version-history.aspx

https://www.youtube.com/watch?v=ss-j-AoBtpw

https://community.nintex.com/thread/11027

The youtube video was extremely helpful and when I tested it, it worked. However it is not what I need. I am needing to copy and not move the document at this point in time. Do you happen to know what the copy + document code would be ?‌

Hi Emily, just thought I would chime in on this, however I think that the only way to do this would be to use the Powershell action in Nintex. I have found that other than powershell, the only tool that can copy documents with versions is ShareGate. I do not think that there is a way to automate ShareGate, like with Nintex. 

Here is a thread on copying Documents with versioning in Powershell. Copying Documents With Version History 

You are correct. We do own Sharegate....which is awesome by the way! With Sharegate, our SharePoint developer is able to schedule a job to run that will be able to utilize Sharegate and copy documents from one library to another and maintain the versioning.

Well, in the past we wrote a custom action for nintex to achieve just this. Basically you need to re-create all versions by copying every single version.

For the hard-core techies: maybe god-ol' Frontpage extensions author.dll could preserve versions: https://msdn.microsoft.com/en-us/library/office/ms440627(v=office.14).aspx. (just a thought, haven't tried this yet)