Alfredo, I was aware of this opportunity with solids to voids but 'my voids' do not seem to offer this choice, see partial screen view with a swept blend void form selected adjacent to Properties window:
The void, although selected appears to have no properties! Any ideas please?
Is the Void part of a Group? I've found that you do not have this option in this case - you cannot change a Void to a Solid or vice versa in Groups.
Also, if the Void is cutting any other extrusion, you cannot change it to a Solid. It is possible for a Void to be set to cut an extrusion that it does not even contact, so to remedy this, select the Void and then to Modify tab » Cut ▼ Uncut Geometry. Hover the cursor over the other extrusions, and if any of them become highlighted, then click to disassociate these elements. Once the Void is no longer cutting any elements, you will be able to change it to a Solid.
thank you, that is the key. The void needs to be dissassociated with the object it is cutting before it can be converted. Have accepted what you have said as the solution. This advice should be documented in WikiHelp.