Invalid or deleted object

This report must begin with an apology.  Not only is it non-repeatable (cannot be reproduced directly), since it was also non-persistent (do or re-do what I intended and it disappeared) and easily worked around or ignored, I do not have many helpful artifacts nor do I recall just what caused it.

The following screen grab shows B1 selected.  I do not recall whether the error occurred on selection or when I chose an action (such as Edit Geometry Object).



I think I saved the model after it happened a couple of times:

120mTank100mSphereElectrodes-invalidObj.fea

120mTank100mSphereElectrodes-invalidObj2.fea

These files were saved on Dec 7, 2020, so I would have probably been using the version of FEATool most current at the time.

If it happens again I will try to be more observant.

Thanks for taking a look.

Kind regards,
Randal