[Plugin] Myo

[getnamo]

@coreyx;342263

The current version of the Myo plugin (0.7.11) is still crashing the UE4 editor when Myo Connect is not running.

I’ve traced crash to an assert in a function being called after plugin startup.

The actual error is:

"Assertion failed: O != NULL [File:C:\Users\<*user*>\Desktop\<*project*>\Plugins\MyoPlugin\Intermediate\Build\Win64\UE4Editor\Inc\MyoPlugin\MyoPlugin.generated."

UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\core\private\misc\outputdevice.cpp:355]
UE4Editor_MyoPlugin!IMyoInterface::Execute_DeviceDisabled() [c:\users\<user>\desktop\<project>\plugins\myoplugin\intermediate\build\win64\ue4editor\inc\myoplugin\myoplugin.generated.cpp:196]
UE4Editor_MyoPlugin!FMyoPlugin::SetDelegate() [c:\users\<user>\desktop\<project>\plugins\myoplugin\source\myoplugin\private\fmyoplugin.cpp:814]
UE4Editor_MyoPlugin!MyoDelegate::MyoStartup() [c:\users\<user>\desktop\<project>\plugins\myoplugin\source\myoplugin\private\myodelegate.cpp:206]

Here’s what’s happening…

You are my hero, it seems there were cases where you could have Null set as the interface delegate and it would emit MyoDisabled all other cases are guarded by valid Myo Id. means your recommended fix only needed to be applied to that one event.

void MyoDelegateBlueprint::MyoDisabled()
{
	if (IsValidDelegate())
		IMyoInterface::Execute_DeviceDisabled(_interfaceDelegate);
}

Thanks a lot for finding this! Gotta say that I’m also happy I commented my code earlier…

@Cupit

I use plugin in 4.8 ,just by blueprint .It runs ok in editor But can not run after package . Crashed !Anyone can help me ?
Fatal error!

may be the same error see if the latest (0.7.12) didn’t fix that for you and that you’ve followed the packaging instructions found on github. If there is still a problem, post or pm me your logs from the crash found under saved/logs.

Update to 0.7.12
-Should no longer crash in the cases where Myo Disabled is emitted but no
delegate is set.