Great. Thank you Rich. I will give that a try.
I am keen to find a reason for it, as I am sure I will bump into it again.

Thanks Rich.
I tried something similar and got it to work.
It still leaves the question as to why 'split' left pieces that could not be reduced in size with push/pull.
I imagine it is some setting along the way but it is mysterious.

Thanks Rich.
I am creating an archway and the flat box is one of those in the attached image once I have split them from the arch. I need to reduce their size so that they act as inset mortar between the blocks of stone that make up the arch.

Hello
I have used the split tool to cut a curve from a 6mm thick block. I now want to offset a line and cut away the outer area so that the resulting block is smaller all the way around. Please see the attached image.
I create the offset line but then the push tool is unable to push through the outer area to cut it away.
Revealing hidden geometry shows some additional lines which are not part of my modelling workflow and must be the thing that is stopping the push tool from working.
To create the solid that cut away/split off the curve, I created a shape with parts of circles and then used the follow me tool around a path.
Any thoughts would be much appreciated.
Many thanks in advance.!

Thanks fot the response.
I tried again this morning and when pressing Manage Licence I now have been offered the chance to load the licence.
It must have just been a time thing, or perhaps my PC needed to be off and the then switched back on.
All good to go now.
Many thanks.

Hello.
I have just purchased a licence of Fredospline and though I have followed all the recommended actions, Sketchup still thinks that I jsut have the trial version and that the time has run out.
I have Libfredo6 and the sketchucation manager installed so am very confused as to why I can't use my new licence.
Any help would be much appreciated.
Thanks.