Sheet Body Cannot be Selected

Hi guys I wonder if someone can help to explain my problem…

I’ve imported a stp file and unable to edit it, being shown the “sheet body cannot be selected” message

But with a similar/same model/process the other day I had no issues…

Model imported from sketchup


Hello Rob,
Please send us the STP file via We will further look into the issue and then get back to you as soon as possible.

Which tool do you want to use?