# Functions from function libraries give errors when re-opening project **URL:** \ **Category:** Programming & Scripting\ **Tags:** unreal-engine\ **Created:** [January 30, 2015, 2:24am UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434 "2015-01-30T02:24:21Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Hyperloop](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/hyperloop/32/1203427_2.png) [@Hyperloop](https://forums.unrealengine.com/u/Hyperloop)\ **Post date:** [January 30, 2015, 2:24am UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/1 "2015-01-30T02:24:21Z")
Win 7 64 bit, UE 4.6.1. I have a couple function libraries that I make use of in a number of blueprints. Any blueprint that uses this library will fail to compile upon re-opening project. only way to solve it is to re-compile function library itself(even though it does not say it needs it.) ![28437-bug.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/a/5/e/a5ea48cb7d5710db624acea82355f21fc6de31d9.jpeg) ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [January 30, 2015, 3:35pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/2 "2015-01-30T15:35:01Z")
Hi , Does this happen with any of your function libraries, or only some? Does it only happen with custom function libraries? Would you mind zipping and attaching .uasset for one of libraries with which this error occurs? Thanks! ---
**Author:** ![Hyperloop](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/hyperloop/32/1203427_2.png) [@Hyperloop](https://forums.unrealengine.com/u/Hyperloop)\ **Post date:** [January 30, 2015, 4:34pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/3 "2015-01-30T16:34:46Z")
Right now it is happening with both of function libraries, however, I use functions from both libraries in one of blueprints that exhibits this problem so I can’t preclude possibility that it may be related to blueprint itself. I’ll up one of libs and send it your way. ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [February 4, 2015, 12:49am UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/4 "2015-02-04T00:49:22Z")
, Just checking in to see if this issue is still happening for you. If so, let me know if you can send one of problem libraries to me. Thanks! ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [February 11, 2015, 8:16pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/5 "2015-02-11T20:16:58Z")
Hi , I haven’t heard back from you in a while on this, so I’m resolving post for now. If you’re still seeing this behavior and get opportunity to and attach one of problem libraries for us, we’ll continue looking into it. Thanks! ---
**Author:** ![anonymous\_user\_8f043ea0](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_8f043ea0](https://forums.unrealengine.com/u/anonymous_user_8f043ea0)\ **Post date:** [March 4, 2015, 8:29pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/6 "2015-03-04T20:29:54Z")
I am having this problem. Where do I send library? ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [March 4, 2015, 8:37pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/7 "2015-03-04T20:37:38Z")
You can and attach it here in a comment. ---
**Author:** ![anonymous\_user\_8f043ea0](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_8f043ea0](https://forums.unrealengine.com/u/anonymous_user_8f043ea0)\ **Post date:** [March 4, 2015, 8:38pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/8 "2015-03-04T20:38:57Z")
I don’t own BP code, it belongs to my company, so I can’t attach it in a public comment (trivial as it might be). ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [March 4, 2015, 8:45pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/9 "2015-03-04T20:45:08Z")
You can send me a download link via PM on forums, if you’d prefer. ---
**Author:** ![anonymous\_user\_8f043ea0](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_8f043ea0](https://forums.unrealengine.com/u/anonymous_user_8f043ea0)\ **Post date:** [March 4, 2015, 9:03pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/10 "2015-03-04T21:03:35Z")
OK, file sent. ---
**Author:** ![Hyperloop](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/hyperloop/32/1203427_2.png) [@Hyperloop](https://forums.unrealengine.com/u/Hyperloop)\ **Post date:** [March 4, 2015, 9:08pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/11 "2015-03-04T21:08:26Z")
Can you post your findings here? I’m still having this issue, but because of some dependencies, I haven’t been able to completely separate blueprint library I’m having issues with in order to send it to you. ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [March 4, 2015, 9:16pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/12 "2015-03-04T21:16:51Z")
Will do, though I’ll be keeping details of David’s .uasset private. Hopefully we’ll be able to narrow down cause and enter a bug report for devs. I’ll let you know what happens. ---
**Author:** ![Hyperloop](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/hyperloop/32/1203427_2.png) [@Hyperloop](https://forums.unrealengine.com/u/Hyperloop)\ **Post date:** [March 4, 2015, 9:21pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/13 "2015-03-04T21:21:05Z")
Another data point as we narrow in on this: issue has persisted after replacing several of functions in function library. It seems like it may not be tied to a particular node or function but to library object itself possibly. ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [March 5, 2015, 1:04am UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/14 "2015-03-05T01:04:35Z")
I understand if neither of you can share entire project. If you’re able to create a small test project that reproduces this issue, that would be very helpful. As of now, I don’t have reliable reproduction steps and I haven’t been able to see this particular bug in 4.6 yet. ---
**Author:** ![Hyperloop](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/hyperloop/32/1203427_2.png) [@Hyperloop](https://forums.unrealengine.com/u/Hyperloop)\ **Post date:** [March 5, 2015, 7:34am UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/15 "2015-03-05T07:34:31Z")
I should be able to share entire project with you. I’ll work on hosting it some place this week and I’ll pm you link. ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [March 5, 2015, 4:44pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/16 "2015-03-05T16:44:44Z")
Sounds good. I’ll keep looking for a repro here as well. ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [March 12, 2015, 11:28pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/17 "2015-03-12T23:28:27Z")
Hi all, I haven’t heard back from you in a little while, so I’m resolving this post for now. We believe this may be fixed as a result of UE-11185, which is included in 4.7.3. GitHub commit for that, if you’re interested, is this: If you upgrade to 4.7.3 when it is released (happening real soon) and this issue is not resolved, please let us know. Thanks! ---
**Author:** ![anonymous\_user\_8f043ea0](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_8f043ea0](https://forums.unrealengine.com/u/anonymous_user_8f043ea0)\ **Post date:** [March 12, 2015, 11:33pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/18 "2015-03-12T23:33:16Z")
Will do. We’re hoping to migrate to 4.7 code soon. Maybe we can grab head revision and get that change. ---
**Author:** ![anonymous\_user\_33800a51](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_33800a51](https://forums.unrealengine.com/u/anonymous_user_33800a51)\ **Post date:** [March 12, 2015, 11:36pm UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/19 "2015-03-12T23:36:04Z")
4.7 branch on GitHub is what we’ll be releasing as 4.7.3, or pretty close, and this commit should be included. ---
**Author:** ![Hyperloop](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/hyperloop/32/1203427_2.png) [@Hyperloop](https://forums.unrealengine.com/u/Hyperloop)\ **Post date:** [April 1, 2015, 12:45am UTC](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434/20 "2015-04-01T00:45:19Z")
, sorry it’s taken so long. I have an update on this for you though. **I discovered issue:** Placing a “get all actors of class” node in your function library seems to cause issue. I’ve reproduced it in new function libraries to confirm. problem goes away once you remove offending node. Note: Node must be pointing to an object, and not ‘none’ ![36760-capture.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/0/a/0/0a01980a3d8c6dcfe015679924df45a7856f7f52.jpeg) [Next page](https://forums.unrealengine.com/t/functions-from-function-libraries-give-errors-when-re-opening-project/305434.md?page=2)