# UEFN MEMORY CALCULATION ERROR **URL:** \ **Category:** Issues and Bug Reporting\ **Tags:** unreal-engine, fortnite-creative, unreal-editor-for-fortnite, fixed, fortnite\ **Created:** [November 13, 2025, 3:02pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671 "2025-11-13T15:02:12Z")\ **Posts on this page:** 18\ **Page:** 1
**Author:** ![Boxdel777](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Boxdel777](https://forums.unrealengine.com/u/Boxdel777)\ **Post date:** [November 13, 2025, 3:02pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/1 "2025-11-13T15:02:12Z")
### Summary I have a problem because I turned on memory calculation and it kept calculating and wouldn’t finish the calculation, so I had to turn off UEF completely and now when I want to start memory calculation I can’t do it because it stops loading at 0% and I get an internal error, parallel transfer flow is already enabled. ### Please select what you are reporting on: Unreal Editor for Fortnite ### What Type of Bug are you experiencing? Memory ### Steps to Reproduce Open the project in UEFN (island code: 4174-2530-8404). Start a test session in Fortnite (Live Edit). Pause the test session and return to UEFN. Go to the Publish panel. Click the Calculate Memory button or try Publishing a new private version. ### Expected Result I expect that after the memory calculation is completed, the Memory Usage status will change to green (No action required) and I will be able to successfully publish a new private version. ### Observed Result The Memory Usage status remains orange with the message: “Action required. Start UEFN memory calculation during session…” An internal error appears: “A parallel upload flow is already running. Internal error.” The UEFN logs (Output Log) show that the memory calculation (MemorySamplerStateChanged: EMemorySamplerState::Ready) completes successfully, but immediately afterwards the network connection is lost (LogNet::Close), resetting the project state in UEFN. ### Platform(s) windows ### Island Code 4174-2530-8404 ### Upload an image ![{EA9860EF-4CC1-46AE-9756-67C5354438C8}.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/4/d/9/4d92ba1f853f74d54436b79dce65bef1f98711ac.png) ![{B377ACD4-04EE-4321-B4B7-2D87DC2EDFEF}.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/0/d/f/0dfa232488c6e848d1225ea73a917226bde0729d.png) ![{6F45C1B0-F2F0-430C-92B5-0ECBC20D30B8}.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/a/c/4/ac4652e6439af018c3a3f01312f98c47b776229a.png) ### Additional Notes Please investigate this Internal Error. Internal log analysis indicates that the problem lies with the UEFN application resetting the project status (SetUploadRequired 1 setting) after losing network connection to the server, which occurs immediately after a successful memory calculation. The project status is locked on the server. Please manually reset the publish status for my island. ---
**Author:** ![Tokyo4033](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Tokyo4033](https://forums.unrealengine.com/u/Tokyo4033)\ **Post date:** [November 15, 2025, 4:50am UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/2 "2025-11-15T04:50:00Z")
Lo Pudistes solucionar? igual a mi me sale ese error ---
**Author:** ![CLMChronos](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@CLMChronos](https://forums.unrealengine.com/u/CLMChronos)\ **Post date:** [November 17, 2025, 12:16am UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/4 "2025-11-17T00:16:32Z")
wait so do you know a solution to ffix this because i cant publish any map now ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [November 18, 2025, 2:22pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/6 "2025-11-18T14:22:23Z")
@Boxdel777 could we please get your UEFN logs so we can investigate? Thank you! [How to get your Fortnite logs](https://forums.unrealengine.com/t/how-to-get-your-fortnite-logs/682382) ---
**Author:** ![ScubaFNBR](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ScubaFNBR](https://forums.unrealengine.com/u/ScubaFNBR)\ **Post date:** [November 18, 2025, 3:41pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/8 "2025-11-18T15:41:58Z")
I figured it out to be an issue with auto localization and localization. If you delete localization you can launch a memory calc completely fine ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [November 18, 2025, 4:17pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/9 "2025-11-18T16:17:23Z")
Thank you for letting us know! We’ll close this one. ---
**Author:** ![Jamie\_Dale](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jamie_dale/32/1165413_2.png) [@Jamie\_Dale](https://forums.unrealengine.com/u/Jamie_Dale)\ **Post date:** [November 18, 2025, 10:57pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/10 "2025-11-18T22:57:12Z")
Does anyone who had this issue have an editor log from when the issue was occurring? I have been unable to reproduce this myself, but a failure of “Internal Error” means that the auto localization code took an unexpected path, and a log should help to identify which call failed. ---
**Author:** ![Tokyo4033](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Tokyo4033](https://forums.unrealengine.com/u/Tokyo4033)\ **Post date:** [November 19, 2025, 4:46am UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/11 "2025-11-19T04:46:43Z")
[Error.zip](https://forums.unrealengine.com/uploads/short-url/mtMw1dZOvzk7HsqVdtoVgvGMwpk.zip) (9.0 MB) ---
**Author:** ![ScubaFNBR](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ScubaFNBR](https://forums.unrealengine.com/u/ScubaFNBR)\ **Post date:** [November 19, 2025, 5:55pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/14 "2025-11-19T17:55:09Z")
[LogsError.zip](https://forums.unrealengine.com/uploads/short-url/m7kGkh9QXg7uEjT2ELmSxs0aq0k.zip) (11.8 MB) ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [November 19, 2025, 6:01pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/15 "2025-11-19T18:01:43Z")
Thanks, both! ---
**Author:** ![Jamie\_Dale](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jamie_dale/32/1165413_2.png) [@Jamie\_Dale](https://forums.unrealengine.com/u/Jamie_Dale)\ **Post date:** [November 19, 2025, 10:36pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/16 "2025-11-19T22:36:54Z")
Thanks for the logs! I’ve identified the cause as a conflict between the localization export performed during build code generation and the “Auto Push Verse Changes” option, as the localization export compiles Verse which then triggers an additional upload request. To workaround the issue for now, simply disable the “Auto Push Verse Changes” option (in the … menu next to “Launch Session”) when producing a build code or running the memory calculation. ---
**Author:** ![ScubaFNBR](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ScubaFNBR](https://forums.unrealengine.com/u/ScubaFNBR)\ **Post date:** [November 20, 2025, 12:31am UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/17 "2025-11-20T00:31:30Z")
Thank you so much for taking your time and finding this workaround! I’ve been struggling for days unable to update my map 🥲 . I’m finally able to so thank you!!! ---
**Author:** ![Jamie\_Dale](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jamie_dale/32/1165413_2.png) [@Jamie\_Dale](https://forums.unrealengine.com/u/Jamie_Dale)\ **Post date:** [November 20, 2025, 2:24pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/19 "2025-11-20T14:24:15Z")
A fix for this issue has been submitted to 39.10, but you’ll need to continue to use the workaround until then. ---
**Author:** ![TI\_Musta](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/ti_musta/32/1129132_2.png) [@TI\_Musta](https://forums.unrealengine.com/u/TI_Musta)\ **Post date:** [November 28, 2025, 8:03am UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/22 "2025-11-28T08:03:49Z")
I removed localization and Auto Push Verse Changes but it’s still didn’t help for me ---
**Author:** ![Jamie\_Dale](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jamie_dale/32/1165413_2.png) [@Jamie\_Dale](https://forums.unrealengine.com/u/Jamie_Dale)\ **Post date:** [December 1, 2025, 6:17pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/25 "2025-12-01T18:17:07Z")
Please include an editor log if you’re still having issues. You can send it to me via a DM on the forums if you don’t want to post it publicly. See [How to get your Fortnite logs](https://forums.unrealengine.com/t/how-to-get-your-fortnite-logs/682382) ---
**Author:** ![Gui\_CL](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/gui_cl/32/1130391_2.png) [@Gui\_CL](https://forums.unrealengine.com/u/Gui_CL)\ **Post date:** [December 2, 2025, 1:32am UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/26 "2025-12-02T01:32:40Z")
Thanks mate, you just saved my map ---
**Author:** ![Bug-Reporter](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/bug-reporter/32/997076_2.png) [@Bug-Reporter](https://forums.unrealengine.com/u/Bug-Reporter)\ **Post date:** [February 25, 2026, 9:00pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/27 "2026-02-25T21:00:30Z")
FORT-1018111 is ‘Closed’ as ‘Fixed’. The issue will be addressed in 39.10. ---
**Author:** ![system](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/1/3/713c9d3f58553f0de89543d76a8a3a2779dc9fa4.png) [@system](https://forums.unrealengine.com/u/system)\ **Post date:** [May 12, 2026, 3:02pm UTC](https://forums.unrealengine.com/t/uefn-memory-calculation-error/2674671/28 "2026-05-12T15:02:31Z")
This topic was automatically closed after 180 days. New replies are no longer allowed.