Hi,
I'm working on a scenario where accmergewizard is called from a vf page. It works fine in classic, but lightning gives the following error:
Unable to Access Page
You are missing information needed by the page you have attempted to access. If you believe this is an error, please refresh your screen. If the error persists, please report it to our Customer Support team and provide the URL of the page you were requesting as well as any other related information. 

URL used in code: /merge/accmergewizard.jsp?goNext=+Next+&cid=someAccId&cid=someAccId

Can any one tell about the lightning url hack for accmergewizard ?

Any help would be appreciated.

I have a scenario where a user is using a custom application to determine duplicate accounts, contacts, and leads. 

Is it possible to build an URL containing object ids that would link to the merge wizards for each object?

Thanks for the help.