How To Fix 37721 - Type not allowed for a page element in a tab

37721 - Overview

• Message type: E = Error

• Message class: 37 - Screen Painter

• Message number: 721

• Message text: Type not allowed for a page element in a tab

What causes this issue?

You tried to create a tab page with an element that is not a subscreen
area. However, tab pages must have the type subscreen area, since the
contents of the page are determined by a separate subscreen.

System Response

The tab page cannot be created.

How to fix this error?

If you want to use an existing subscreen area as a tabstrip page, move
it into the page area within the tabstrip control.
if you want to create a new screen element for the tab page, choose the
element type "Subscreen area" and place the element within the page
area of the tabstrip control.
Note: The subscreen area is only assocuated with the page belonging to
the tab title that is currently selected. You can see this
relationship, since the name of the subscreen area is entered in the
"Reference field" field in the tab title attributes.
You can make the relationship apply to more than one tab title by
selecting the required tab titles using multiple selection (press and
hold Ctrl or Alt, then click the required tab titles).
Note: You can also create references between tab titles and subscreen
areas explicitly by entering the name of the subscreen area in the
reference field field of the tab title attributes directly.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 37721 - Type not allowed for a page element in a tab ?

  The SAP error message 37721, which states "Type not allowed for a page element in a tab," typically occurs in the context of SAP Web Dynpro or SAP Fiori applications when there is an issue with the configuration of a tabbed interface. This error indicates that the type of a page element (like a view or a component) that you are trying to use within a tab is not compatible or allowed.
  Causes:
  
  Incompatible Element Type: The element you are trying to add to the tab may not be of a type that is supported within a tabbed interface. For example, certain UI elements or components may not be allowed in a tab.
  Incorrect Configuration: There may be a misconfiguration in the layout or properties of the tab or the elements being added to it.
  Version Issues: Sometimes, the version of the SAP system or the specific components being used may have limitations or