# Crashing with trace bluprint on weapon **URL:** \ **Category:** Blueprint\ **Tags:** UE4-14, trace-channels, unreal-engine, item, question, Blueprint\ **Created:** [December 6, 2016, 5:50pm UTC](https://forums.unrealengine.com/t/crashing-with-trace-bluprint-on-weapon/378517 "2016-12-06T17:50:48Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Kebtiz](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Kebtiz](https://forums.unrealengine.com/u/Kebtiz)\ **Post date:** [December 6, 2016, 5:50pm UTC](https://forums.unrealengine.com/t/crashing-with-trace-bluprint-on-weapon/378517/1 "2016-12-06T17:50:48Z")
Running this blueprint (or blueprints very similar to it as I’ve had to rebuild it manually a few times). The blueprint runs fine, and the traces execute and hit very cleanly, until I save everything and close the engine. At that time I get an error revolving around the weapon producing the traces. It is attached to a socket on my third person character. The biggest change to this version that has changed is that I am limiting the trace to when the parent says the weapon is being swung. Usually I just standby computer when I walk away, so I don’t know which version of the blueprint started crashing on load, but I haven’t be able to get a version with the bool from parent to work on loading engine. ![117628-weapon_trace.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/d/7/7/d77bbe4158c0dfac989522a5528a924ee8c28b2f.jpeg) [link text][2] A brief summary since the vector lines get a bit out of hand, the top row of traces runs from last\_x/3 to current socket location, and the second row of traces runs diagonally from 2 current sockets. Also is there a better way to screenshot larger blueprints? The lines seemed to move as I was panning and matching the 3 together looks like a bit of a hack job. I’m not sure what other information is relevant to this, let me know and I will add anything. EDIT: oh, the debug type has been set to duration every time I’ve saved, closed, and crashed, this was just a quick rebuild for the post. I should also add this is using blueprints on a c++ project. ---
**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:** [December 7, 2016, 3:53pm UTC](https://forums.unrealengine.com/t/crashing-with-trace-bluprint-on-weapon/378517/2 "2016-12-07T15:53:06Z")
Hello Kebtiz, After looking over the information provided, it appears that this is a known issue and that it has been submitted to the developers for further consideration. I have provided a link to the public tracker. Please feel free to use the link provided for future updates. Link: [Unreal Engine Issues and Bug Tracker (UE-39323)](https://issues.unrealengine.com/issue/UE-39323) Make it a great day ---
**Author:** ![Kebtiz](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Kebtiz](https://forums.unrealengine.com/u/Kebtiz)\ **Post date:** [December 7, 2016, 8:37pm UTC](https://forums.unrealengine.com/t/crashing-with-trace-bluprint-on-weapon/378517/3 "2016-12-07T20:37:25Z")
Is there any easy work around for this in the mean time? Some way to get the variable status without casting perhaps? ---
**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:** [December 7, 2016, 8:55pm UTC](https://forums.unrealengine.com/t/crashing-with-trace-bluprint-on-weapon/378517/4 "2016-12-07T20:55:46Z")
I do not have a workaround for this issue at this time. ---
**Author:** ![Kebtiz](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Kebtiz](https://forums.unrealengine.com/u/Kebtiz)\ **Post date:** [December 7, 2016, 9:10pm UTC](https://forums.unrealengine.com/t/crashing-with-trace-bluprint-on-weapon/378517/5 "2016-12-07T21:10:01Z")
Okay, thank you for reply, I will do some fiddling and report back if I find anything.