# \[4.12.5\] \[bug\] Splitting struct pin on custom event in widget shows error label when modifying widget's variables

**URL:** <https://forums.unrealengine.com/t/4-12-5-bug-splitting-struct-pin-on-custom-event-in-widget-shows-error-label-when-modifying-widgets-variables/368279>\
**Category:** UI\
**Tags:** variables, custom-event, Structure, unreal-engine, Widget, question, Blueprint\
**Created:** [August 25, 2016, 7:56pm UTC](https://forums.unrealengine.com/t/4-12-5-bug-splitting-struct-pin-on-custom-event-in-widget-shows-error-label-when-modifying-widgets-variables/368279 "2016-08-25T19:56:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![m500](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@m500](https://forums.unrealengine.com/u/m500)\
**Post date:** [August 25, 2016, 7:56pm UTC](https://forums.unrealengine.com/t/4-12-5-bug-splitting-struct-pin-on-custom-event-in-widget-shows-error-label-when-modifying-widgets-variables/368279/1 "2016-08-25T19:56:13Z")

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When using a custom event in a widget that uses a struct as its input, if the pin was split to show the struct’s variables an error will appear when a variable to the widget is added, removed or modified. This error message does not do anything and disappears when the widget blueprint is recompiled.

**Steps to reproduce:**

1. Create a structure with variables in it.
2. Make a User widget blueprint.
3. In the graph add CustomEvent with the input being the structure.
4. Split the structure pin.
5. Add a new variable to the widget and see error.

[Link to screen recording of how to reproduce here.][2]

Picture of issue here:

[](https://i.imgur.com/madNpkI.png)

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**Author:** ![anonymous\_user\_e729f54e](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_e729f54e](https://forums.unrealengine.com/u/anonymous_user_e729f54e)\
**Post date:** [August 26, 2016, 1:25pm UTC](https://forums.unrealengine.com/t/4-12-5-bug-splitting-struct-pin-on-custom-event-in-widget-shows-error-label-when-modifying-widgets-variables/368279/2 "2016-08-26T13:25:23Z")

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Hello m500,

I was able to reproduce this issue on our end. I have written up a report and I have submitted it to the developers for further consideration. I have also provided a link to the public tracker. Please feel free to check the link provided for future updates.

Link: [Unreal Engine Issues and Bug Tracker (UE-35223)](https://issues.unrealengine.com/issue/UE-35223)

Make it a great day