Installation & Update Issues
DLL load failed: %1 is not a valid Win32 application
This happens on Windows when your Blender Application Data folder is corrupted. We never found a good reason for when this happens, but it does happen.
Clean up your Application Data. You find the data here:
Sometimes another Add-on installation pollutes the Application data folder with scripts and libraries from older blender versions. This can easily make it impossible to install another Add-on. We make sure that our Add-ons never creates such sort of pollution. And here is how you can get out of this issue:
- Locate the Blender Application data folder (see above)
- within the folder locate the subfolder that is named like your Blender release, such as:
- rename this folder to something like
Note: The name is not important, use whatever is convenient for you. You even can delete the folder if you like, but see below!
- Now restart Blender
This will cleanup your application data folder. But take care! This resets blender to its Factory settings. Any other Add-on that you have installed is no longer visible and you need to install them again. However you can use the hidden subfolder ( 2.82_hide in my example) to recreate your installation. Although in most cases it seems easier to install all of your Add-ons again.
When the update fails
When you update an Add-on in Blender, then normally the following steps are performed:
- The installer disables the current version of the Add-on.
- The disabled Add-on is removed from the system (deleted from disk),
- The new Add-on version is installed.
- You now can enable the new version manually
However sometimes the first step (disabling the Add-on) does not disable all of the software. So it may happen that the old Add-on leaves some traces which may result in subsequent errors when the new version is enabled in step 4.
When the above situation happens to you, then please go ahead as follows:
Step 0: Remove traces
- Save Preferences at the bottom of the User Preferences Panel
- Then close Blender
Note: It is important that you really close blender.
Just opening a new scene is not enough!
- Open Blender and open the User preferences again
- Type “Avastar” into the Add-on search field to locate your Add-on
- Then Enable the Add-on
In most cases this is all that you need to do. The Add-on will enable without errors.
If the above procedure does not work for you, then you need to put blender into a clean state as follows:
Step 1: Remove Avastar
Step 2: Save User Settings
Step 3: Restart Blender and Install the new Avastar Add-on
Go ahead by installing your Add-on: