# \[4.13\] Missing output/input pins for blueprint functions **URL:** \ **Category:** Blueprint\ **Tags:** UE4-13, unreal-engine, Blueprint, question\ **Created:** [September 4, 2016, 11:20pm UTC](https://forums.unrealengine.com/t/4-13-missing-output-input-pins-for-blueprint-functions/369389 "2016-09-04T23:20:06Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![mosowski](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@mosowski](https://forums.unrealengine.com/u/mosowski)\ **Post date:** [September 4, 2016, 11:20pm UTC](https://forums.unrealengine.com/t/4-13-missing-output-input-pins-for-blueprint-functions/369389/1 "2016-09-04T23:20:06Z")
Some of our blueprints got corrupted after the migration from 4.12.5 to 4.13. This is how the problem usually looks like: ![Screen](https://d3kjluh73b9h9o.cloudfront.net/original/4X/c/e/d/cedaa0dc17910242c1ef31679303e5e292b98d44.png) Note that inputs and outputs are actually listed on the list. Graph ain’t responding to changes of the missing pins types or names. What could cause this strange behaviour? How to deal with it? ---
**Author:** ![ambershee](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ambershee](https://forums.unrealengine.com/u/ambershee)\ **Post date:** [September 5, 2016, 1:54pm UTC](https://forums.unrealengine.com/t/4-13-missing-output-input-pins-for-blueprint-functions/369389/2 "2016-09-05T13:54:32Z")
I’ve encountered a similar and likely related issue migrating our project from 4.11 to 4.13: [![](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/c/7/8c79a94fddedc5cb7264c6da10adaa55bfe90f5f.png) ](https://snipboard.io/3hXGcM.jpg) Many of the collapsed graphs have their input nodes missing. Some of them still have an input in the parent graph, but the input on the collapsed side is missing instead. It’s quite a pain, but I’m going to have to go through the entire game and fix up each part one at a time. ---
**Author:** ![anonymous\_user\_61b4a355](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_61b4a355](https://forums.unrealengine.com/u/anonymous_user_61b4a355)\ **Post date:** [September 5, 2016, 4:59pm UTC](https://forums.unrealengine.com/t/4-13-missing-output-input-pins-for-blueprint-functions/369389/3 "2016-09-05T16:59:27Z")
Hey mosowski, Are these Blueprint functions created in Blueprint or are they coming from C++? Thanks. ---
**Author:** ![mosowski](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@mosowski](https://forums.unrealengine.com/u/mosowski)\ **Post date:** [September 5, 2016, 5:03pm UTC](https://forums.unrealengine.com/t/4-13-missing-output-input-pins-for-blueprint-functions/369389/4 "2016-09-05T17:03:04Z")
Hi, All of these functions are made in Blueprint. Our game is being made mostly of blueprints. Same as @, we have similar problems with collapsed nodes as well. I can send stripped-down version of our project to you. ---
**Author:** ![anonymous\_user\_61b4a355](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_61b4a355](https://forums.unrealengine.com/u/anonymous_user_61b4a355)\ **Post date:** [September 5, 2016, 5:07pm UTC](https://forums.unrealengine.com/t/4-13-missing-output-input-pins-for-blueprint-functions/369389/5 "2016-09-05T17:07:38Z")
Thanks. I will try and reproduce the issue on my end. I will update the post with what I find. ---
**Author:** ![mosowski](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@mosowski](https://forums.unrealengine.com/u/mosowski)\ **Post date:** [September 5, 2016, 5:40pm UTC](https://forums.unrealengine.com/t/4-13-missing-output-input-pins-for-blueprint-functions/369389/6 "2016-09-05T17:40:45Z")
There it is: > **[Meet Google Drive – One place for all your files](https://accounts.google.com/ServiceLogin?service=wise&passive=1209600&continue=https:%2F%2Fdrive.google.com%2Ffile%2Fd%2F0B_v9ScWOKnF1RDBXOFZtUllYSEE%2Fview?usp%3Dsharing&followup=https:%2F%2Fdrive.google.com%2Ffile%2Fd%2F0B_v9ScWOKnF1RDBXOFZtUllYSEE%2Fview?usp%3Dsharing)** > > Google Drive is a free way to keep your files backed up and easy to reach from any phone, tablet, or computer. Start with 15GB of Google storage – free. Don’t mind missing assets errors, try migrate this to 4.13 and take a look at BP\_Island and Apply Rotation Internal function. Pin for “Direction” input is missing. ---
**Author:** ![anonymous\_user\_61b4a355](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_61b4a355](https://forums.unrealengine.com/u/anonymous_user_61b4a355)\ **Post date:** [September 5, 2016, 6:23pm UTC](https://forums.unrealengine.com/t/4-13-missing-output-input-pins-for-blueprint-functions/369389/7 "2016-09-05T18:23:50Z")
Hey mosowski, Thank you for the bug report. I was able to see the issue in your project and created a ticket for it. You can follow it here: [https://issues.unrealengine.com/issue/UE-35585](https://issues.unrealengine.com/issue/UE-35585) ---
**Author:** ![mosowski](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@mosowski](https://forums.unrealengine.com/u/mosowski)\ **Post date:** [September 5, 2016, 6:28pm UTC](https://forums.unrealengine.com/t/4-13-missing-output-input-pins-for-blueprint-functions/369389/8 "2016-09-05T18:28:53Z")
Thanks! I will keep an eye on it.