VLIDE cannot open acad.dce file - Why? Where?

[hencoop]

(findfile "acad.dce") returns nil

So, why can not AutoCAD open this file? Where is this file supposed to be created by Autodesk?

[DannyNL]

Are we talking about .DCE or .DCL files?

Looking at the error message you post, I'm assuming you mean .DCL files and that you are trying to get a preview of your .DCL file in the Visual LISP editor (Tools->Interface Tools->Preview DCL in Editor).

Unfortunately to enable this you'll need to make sure you have write-access to the C:\Program File\Autodesk\AutoCAD 2017 folder as the Visual LISP Editor will try to create a temporary file on that location before showing the preview. AFAIK this is inherited from the past and hasn't been changed ever since, hence  the need for write-access at that location.

[hencoop]

The temporary DCL file $vld$.dcl gets created in that folder.  There is no problem there.  The ACAD.DCE file does not get created but I have no idea where it is trying to create it.  I thought AutoCAD creates it in the current drawing folder but apparently not.  I have no idea what folder I need to take ownership of and give write access to in order to solve this problem.

BTW, I am on a new Win10 system, i9-7900X @ 3.3GHz, 1TB M2 SSD, 32GB M2 Optane, 32GB 2666 System RAM

Not sure if any of that other than Win10 could affect this problem.