When creating the Dynamic Form it is needed to set whether it will be Wizard or Plain, and if it will have Resume or not.

//Create Dynamic Form
&WWP_Form= New()
For Each WWP_Form
    Order (WWPFormId)
    &WWP_Form.WWPFormId = WWPFormId
    Exit
EndFor
&WWP_Form.WWPFormId += 1
&WWP_Form.WWPFormVersionNumber = 1
&WWP_Form.WWPFormTitle = "My New Form Example"
&WWP_Form.WWPFormReferenceName = "FormExample"
&WWP_Form.WWPFormDate = now()
&WWP_Form.WWPFormIsWizard = True //True Or False
&WWP_Form.WWPFormResume = WorkWithPlus.DynamicForms.WWP_DF_Resume.AskUser
&WWP_Form.WWPFormResumeMessage = "Do you want to continue filling the form that you have in progress?"