Error code on vbokcancel

I'm getting a request to debug when I click cancel on my msgbox. This is how it's coded:

bytAns = MsgBox("Proceed only if there are no open workbooks titled 'Book 1' and you've completed all other steps", vbOKCancel,)
If bytAns = vbCancel Then DoCmd.CloseSub

Any suggestions?

What is the comma after vbOKCancel,) ?

Do you mean ", vbOKCancel,vbCancel)?

Not sure lol. It didn't seem to be hurting anything. I did remove it, the highlighted field in the debugger is the "do command" argument.