Device Family: Intel® Arria® 10, Intel® Cyclone® 10, Gen 10, Intel® Stratix® 10

Type: Answers

Area: Intellectual Property

Last Modified: September 10, 2018
Version Found: v18.0 Update 2
Bug ID: FB: 583955;

How do I extend Windows* Server 2016 file path support from 260 to to 1024 characters?


Windows* Server 2016 supports file paths up to 260 characters by default. Starting from build 1607, Windows Server 2016 now supports longer paths up to 1024 characters with the proper registry configuration. The Intel® Quartus® Prime Pro Edition software can now support file paths up to 1024 characters when Windows Server 2016 registry is correctly configured.


To configure your Windows* Server 2016 system registry to support long file paths, follow these steps:

Verify or edit the Registry settings to support long paths:

a)      Open the Registry Editor (Press Windows* Key and type regedit and press Enter key)

b)      Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem

c)      Change LongPathsEnabled value to 1. If you do not see LongPathsEnabled listed, you must create the entry by right-clicking the FileSystem key, choosing New > DWORD (32-bit) Value, and then naming the new value LongPathsEnabled.

Verify or edit any Group Policy to support long paths:

a)      Open Group Policy Editor* (Press Windows Key and type gpedit.msc and hit Enter key)

b)      Navigate to the following directory: Local Computer Policy > Computer Configuration > Administrative Templates > System > Filesystem > NTFS.

c)      Click Enable NTFS long paths option and enable it.

These changes have been verified with Intel® Quartus® Prime Pro and Windows* Server 2016 build 1607 only. Other Windows OS, such as Windows 10 have not been verified.