Inventor did not save all settings
Which settings are not being "saved"? I see that you've changed the default settings for the location of the Project files.
Inventor 2020, In-Cad, Simulation Mechanical
Just insert the picture rather than attaching it as a file
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Delta Tau Chi ΔΤΧ
I think you are being mislead by this check box. Inventor relies on the Project File to locate the stored location for your files. It uses the Project File to save and locate files for your assemblies as well as where to save all files.
You need to create a Project File that tells Inventor which folder is your Work folder where your models are stored and any Library folders. This check box that you have circled in "blue" will ignore and bypass the search function to locate files that are outside of the Project File search paths.
Inventor 2020, In-Cad, Simulation Mechanical
Just insert the picture rather than attaching it as a file
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Delta Tau Chi ΔΤΧ
Inventor writes/updates the WIndows Registry upon proper shut-down and closure of Inventor. Should another instance of Inventor be running in the background, any changes won't be written to the Windows Registry.
Also Inventor requires privilege levels above the "Standard" user settings. They require "Power User or Administrator" level to write to the Windows Registry.
Check with the Task Manager in Windows to see if other instances of Inventor is running. Also look at your security user setting as well. On a network, we will give users "Administrative" levels only at the local machine.
Possibly a virus on your machine may also hinder updates to the Windows Registry.
Inventor 2020, In-Cad, Simulation Mechanical
Just insert the picture rather than attaching it as a file
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Delta Tau Chi ΔΤΧ
I only use cCleaner to clean the trash and temp files, it's been known to break the Windows Registry.
You might need to registry Inventor
Re-Register Inventor
1. open a command prompt as administrator
2. type :
"C:\Program Files\Autodesk\Inventor 2016\Bin\Inventor.exe" /install
3. Wait for about 30 seconds & then retry Inventor
Inventor 2020, In-Cad, Simulation Mechanical
Just insert the picture rather than attaching it as a file
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Delta Tau Chi ΔΤΧ
If you've re-registered Inventor and the same issue is showing up, try logging in as a different User and see if the problem persists. It could be a issue with the R3 update or something deeper that may require a support call with ADSK.
Inventor 2020, In-Cad, Simulation Mechanical
Just insert the picture rather than attaching it as a file
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Delta Tau Chi ΔΤΧ
I don't know what to say, That settings stay's on both my Office PC as well as my home PC.
Inventor 2020, In-Cad, Simulation Mechanical
Just insert the picture rather than attaching it as a file
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Delta Tau Chi ΔΤΧ
At this point I'm reading this posting and I'm hearing a few things that need clarification...
1. The Skip unresolved option/toggle got toggled on by mistake in Inventor 2017 R2 version release. But if it gets toggled back off under Application Options and you have the proper permission to the registry it should stick. I have not personally seen it where it keeps changing as another user has poitned out.
2. @premysl.misun keeps saying his settings are changing.. Right now I only see one setting in this posting and that's the skip unresolved option. The word settings (plural meaning) to me, means you are experience numerous settings that are not holding. But there's nothing here what those settings are.
3. You said settings are changing when you export to a 3D PDF. What settings are they? Skip unresolved option has nothing to do with export. It only comes into factor when you open your model.
4. You state you have the 3rd highest security. What does that even mean? Are you talking about "Always Notify" on the Windows User Access Control? If so that has nothing to do with settings in Inventor or control or restrict them. That has to do when you install software.
It would just help us if you list all of the settings that you are changing and they are not holding their status. 
Mark Lancaster
& Autodesk Services MarketPlace Provider
Autodesk Inventor Certified Professional & not an Autodesk Employee
Likes is much appreciated if the information I have shared is helpful to you and/or others
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This seems to be the default with Inventor with the Export to 3D PDF. The same can be said for Export to DWF, the last user settings are not retained.
I've added it to the IDEA forum. If you wish to see this enhancement, vote for it, as it Inventor seems to be lacking in retaining user retained settings/customization.
https://forums.autodesk.com/t5/inventor-ideas/retain-last-user-settings/idi-p/6896376
Inventor 2020, In-Cad, Simulation Mechanical
Just insert the picture rather than attaching it as a file
Did you find this reply helpful ? If so please use the Accept as Solution or Kudos button below.
Delta Tau Chi ΔΤΧ
