Thx @BL_Apex (@codeDing)
I am right with my guessing: You are NOT running AutoCAD, you are running CIVIL3D?
(Productname and Productversion, see Command: ABOUT is always an well information in a thread)
C3D has more features about images.
2h ago:
I read the C3D-Help[F1], i found the information about erasing the last reference of an image attachment
(There should be an option for erasing the last reference for an image attachment. Also delete image data YES/NO/ASK
(so far i am guessing, i am not a C3D guy. never learned, never used.)
1h ago:
I downloaded C3D2021, I installed C3D2021,
<break> not enough memory at the drive where i want to create an admin image, clearing the drive a bit..
Start C3D the fitsz time
<break> it will not loaf the C3D cuix . grrrrrrrhhhhh
I used an old C3D.cuix from the internet, this way i can see some C3D specials, but
Nothing what would looking useful.
10min ago:
Now i was fishing in the dark (auto-complete feature of the commandline) and i found MAPIOPTIONS
I started MAPIOPTIONS command, checked the first tab, switched to the second, the GERNAL(?) tab
and there is it, the option you are after
I think you can find the rest yourself (command or registry key), or set the option simply by hand.
Happy to help
Your setting is not set to yes and not to no for the case: if the last reference deleted, should the program also delete the ExternalReferenc Information (hard to describe for me, i mean the line in XREF or -Image dialog)
The first hint from an old help (2013 C3D)
http://docs.autodesk.com/CIV3D/2013/ENU/index.html?url=filesMAPC3D/GUID-482D931B-9B53-43E1-9934-8A52...
Help [F1] about mapioptions
http://help.autodesk.com/view/CIV3D/2021/ENU/?guid=GUID-92323BCB-F8D7-4DB5-B72D-52A5404662ED
If you like to see the dialog in german version: Attached
After 2 1/2h solved