lost work

Logging on o On shape this morning there is no sign of the model i created yesterday. It appears that I have lost a whole days work. This is the first time this has happened to me in a ac few years of using On shape. Can I request a back up copy?

I have been trying to generate some new parts from imported parts that were originally produced by Blender. These parts were very inaccurate in flatness and alignment and dimension. I was using points from these intending to extrude new, straight, flat aligned and accurate parts . Three weeks now and I have had continual…