I did the chkdsk c: /f, nothing amiss.

I also used the built-in Win 10 utility Windows Memory Diagnostic, no issues.

Here is my file, as requested by THeMarkster

Yet one more. Regarding info from TheMarkster: I found the FreeCAD recovery file in the Appdata Local Temp directory for a currently open FreeCAD file. It had a different name from my original file, but I was able to open that file with FreeCAD. I closed it, and I still had my original file open in ...

Yet more to messages above. I did some additional experimenting. If I open a previously saved file for additional work, I can save it in the original location without failure. Then I got failure messages in a few situations: 1. If I go to the saved directory and do a right click copy and then right ...

Further to above:

I reopened the "3 hour old" starting file to edit. I added an item and tried to save. Here is the message I got:

Further to above:

I reopened the "3 hour old" starting file to edit. I added an item and tried to save. Here is the message I got:

Thanks for your replies. My backup settings are at 1, and autorecovery saves at 15 minutes. I have not changed them. I have always maintained a "save often" routine, and never before had this occur. (since version 0.15) I found the backup file in the same directory as the originally saved ...

Is there a temp file from which I could recover about 3 hours worth of work? I was presented with a message that declared I could not save my work for some reason. I tried several ways to save and got the same message. I closed the app, and when I reopened it, my file is not listed on the recent fil...

Re: saving a reference to a scripted object: just feeding back your explanation 1. Add a property to the furniture parts that need to be updated when the carcass changes. The property type needs to be 'App::PropertyLink' 2. After the scripted object is created, save a reference to it and assign the ...

I have tried additional experiments with Expressions ( but not yet with the 'App::PropertyLink' method). I have got everything to work for me when I use my script (below) to create only one carcass with 2 doors. I can move the carcass anywhere and turn it around the z axis to any angle and the doors...