To understand the error, you must first understand the choreography of a PXE boot in SCCM.
Exit Code 14 (0x0000000E) translates to ERROR_FILE_NOT_FOUND in the Windows system error codes. The client is saying, "I successfully contacted the server, but the specific variables.dat file you promised me does not exist at the location you specified."
On the stuck client, press F8 to open a command prompt during the PXE boot (if enabled in the boot image).
The variables.dat file is created on the fly, but it references content (the boot image, the OS image, or a package) that must exist on the DP. unable to download pxe variable file. exit code 14 sccm
To understand why "Exit code 14" occurs, one must first understand what the PXE process is attempting to do. When a computer boots via PXE, it contacts the Distribution Point (DP) to download a boot image (WINPE). Once the boot image loads, a script runs to download the "PXE variable file." This file contains the specific task sequence variables required to identify which task sequence to run, how to find the Management Point, and what policies apply to that specific device.
When the process fails with "Exit code 14," the WinPE environment has successfully booted and obtained an IP address (via DHCP), but the client cannot download that specific variable file from the Distribution Point via HTTP/HTTPS.
A large retail organization reported intermittent Exit Code 14 on 10% of their new store builds. Logs showed ERROR_FILE_NOT_FOUND despite all configurations appearing correct. To understand the error, you must first understand
The Investigation: SMSPXE.log showed the MP generating the policy successfully, but the client never received it. Network traces revealed that an intermediate switch had HTTP Intercept enabled (a feature for web filtering). This switch was intercepting the client's HTTP GET request for variables.dat and returning a cached "404 Not Found" page intended for a different web server.
The Resolution: The network team disabled HTTP Intercept on the VLAN used for OSD. Exit Code 14 vanished overnight.
Lesson: Exit Code 14 can be caused by network security appliances (proxies, firewalls with SSL inspection, or load balancers) that manipulate HTTP traffic between the client and the DP. Exit Code 14 ( 0x0000000E ) translates to
Modern hardware ships with UEFI firmware, but many boot images are still x64 BIOS-compatible. If there is a mismatch, PXE might load the initial network stack but fail when trying to access variable storage due to driver or memory addressing issues.
Check:
Communication for the variable file download occurs over HTTP (port 80) or HTTPS (port 443). However, the initial negotiation and specific SCCM roles require other ports.
