Error: Logic Generation failed to load results from Design Analysis and cannot get the list of IPs in the design

Description

Due to a problem in the Quartus® Prime Pro Edition Software version 26.1 or earlier, you might see this error message during the Support-Logic Generation stage when compiling a design on the Windows* Operating System. This error occurs when Windows* long path support is disabled. Windows* limits the combined length of a file name and its path to 260 characters. If the project path exceeds this limit, the Quartus® Software cannot access required IP or design files.

Resolution

To work around this problem, enable Windows* long path support by updating the registry:

1. a) Open Registry Editor: Press Windows Key + R, type regedit, and press Enter.
2. b) Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem
3. c) Find LongPathsEnabled. Double-click it and set "Value data" to 1.

If the LongPathsEnabled doesn't exist, right-click, select New > DWORD (32-bit) Value, and name it LongPathsEnabled.

1. d) Restart your computer.
   
   This error message will be enhanced in a future release of the Quartus^® Prime Pro Edition Software.