Irrecoverable error

Sorry for the delay.

This is likely a corrupt file. If it were me, I would do a ‘Compact All’, save using a new file name, and continue. This could well cure the problem.

You could also consider just selecting the whole hierarchy and applying an ‘Optimize’ operation. Actually that would probably be my first choice. Be sure to save using a new file name.

I have been tidying up one of my models by deleting points.After 2 or 3 deletions I start to get the irrecoverable error message.

I recover the model and start deleting points again, and , once more, after 2 or 3 deletions I get irrecoverable error.

Can anyone suggest a possible cause/solution?