How to convert enclosed surface to solid in CATIA?

Small example from my side. As there is no software supporting to your .catpart file. I do have Catia v5 r19

  1. Step 1:

    First of all join all the surfaces to which the solid has to be created

  2. Step 2:

    Go to Partdesign workbench

  3. Step 3:

    Select the surface and select the closed surface from the Surface based features

  4. Step 4:

    Then click on the ok button

  5. Step 5:

    Hide the surface to see the solid part