Search in
Sort by:

Question Status:

Search help

  • Simple searches use one or more words. Separate the words with spaces (cat dog) to search cat,dog or both. Separate the words with plus signs (cat +dog) to search for items that may contain cat but must contain dog.
  • You can further refine your search on the search results page, where you can search by keywords, author, topic. These can be combined with each other. Examples
    • cat dog --matches anything with cat,dog or both
    • cat +dog --searches for cat +dog where dog is a mandatory term
    • cat -dog -- searches for cat excluding any result containing dog
    • [cats] —will restrict your search to results with topic named "cats"
    • [cats] [dogs] —will restrict your search to results with both topics, "cats", and "dogs"

A new C++ property added and built in MSDev does not show in the component detail pane after a hot reload?

Tepid Reload, more like.

Now, if you close the editor and reopen the new property is there as expected.

!!!!BUT!!!! And this is the worst of it. If, following Tepid Reload the user happens to save the asset in the blueprint editor the asset saves, but what it saves is not right.

Close the editor. Open the editor. Double click the blueprint and bam, editor crashes.

Assertion failed: InSCSNode->ComponentTemplate != NULL

To me, smells like the save in the intermediate state lays down the updated class's guid/timestamp/checksum without writing out the correct data structure, so when the editor reloads and registers the class with the correct data layout the headers checkout but the data is wrong. Or something like that anyway.

This is a pretty catastrophic problem since it renders any blueprint subject to it unusable. The only option is to restore from an earlier state or rebuild from scratch. Neither option is acceptable in the year 2014.

Branch: Launcher. 4.5.1

Version: 4.5.1-2336687+++depot+UE4-Releases+4.5

Repro (100%):

1/. Add code to project. Show all classes. New class with ActorComponent as base, called "CrashComponent"

2/. Edit code. In CrashComponent.h, change UCLASS() to UCLASS(meta = (BlueprintSpawnableComponent)) so it can be added in a blueprint.

3/. Save/Build. Observe the hot reload in UE4.

4/. In UE4 make a new Actor blueprint called "CrashActor"

5/. Double click "CrashActor" to edit. Switch to Components. Click "Add Component" and choose "Crash"

6/. You should have Crash1 as a component. Compile and save.

7/. Back to MSDev. Just before the end of the class declaration, whack in the following:

"public: UPROPERTY(Category = "Crasher", BlueprintReadWrite, EditAnywhere) float CrashFloat;"

8/. Save/build. Watch the hot reload in UE4. Observe how CrashFloat is not visible in in the detail view for the CrashComponent. Tepid Reload

9/. CLICK ON SAVE IN THE BLUEPRINT! Don't forget: this is the essential step.

10/. Exit UE4.

11/. Relaunch UE4.

12/. Double click on "CrashActor".

13/. POW! Right in the kisser.

Here's the error in full:

Unknown exception - code 00000001 (first/second chance not available)

Assertion failed: InSCSNode->ComponentTemplate != NULL [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.5\Engine\Source\Editor\Kismet\Private\SSCSEditor.cpp] [Line: 3081]

KERNELBASE + 24684 bytes UE4Editor_Core + 3174852 bytes UE4Editor_Core + 1677512 bytes UE4Editor_Core + 1566866 bytes UE4Editor_Kismet + 3128916 bytes UE4Editor_Kismet + 3949080 bytes UE4Editor_Kismet + 3235295 bytes UE4Editor_Kismet + 551991 bytes UE4Editor_Kismet + 752287 bytes UE4Editor_Kismet + 670633 bytes UE4Editor_Kismet + 1129173 bytes UE4Editor_Kismet + 2149318 bytes UE4Editor_AssetTools + 1021261 bytes UE4Editor_UnrealEd + 10642690 bytes UE4Editor_AssetTools + 530329 bytes UE4Editor_ContentBrowser + 1736388 bytes UE4Editor_ContentBrowser + 1255123 bytes UE4Editor_ContentBrowser + 1294632 bytes UE4Editor_ContentBrowser + 1784182 bytes UE4Editor_ContentBrowser + 1227254 bytes UE4Editor_ContentBrowser + 1286539 bytes UE4Editor_ContentBrowser + 1276022 bytes UE4Editor_ContentBrowser + 1869215 bytes UE4Editor_ContentBrowser + 1784767 bytes UE4Editor_Slate + 818133 bytes UE4Editor_Slate + 754699 bytes UE4Editor_Core + 2505996 bytes UE4Editor_Core + 2450091 bytes UE4Editor_Core + 2510873 bytes UE4Editor_Core + 2438466 bytes user32 + 9268 bytes user32 + 8855 bytes UE4Editor_Core + 3157718 bytes UE4Editor!FEngineLoop::Tick() + 3106 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.5\engine\source\runtime\launch\private\launchengineloop.cpp:2111] UE4Editor!GuardedMain() + 479 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.5\engine\source\runtime\launch\private\launch.cpp:133] UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.5\engine\source\runtime\launch\private\windows\launchwindows.cpp:125] UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.5\engine\source\runtime\launch\private\windows\launchwindows.cpp:201] UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]


Product Version: Not Selected
more ▼

asked Oct 28 '14 at 05:49 PM in Bug Reports

avatar image

26 2 6 10

avatar image Doug E ♦♦ STAFF Oct 28 '14 at 06:55 PM

Hey ioJoss-

Which version of Visual Studios are you working in? The editor is meant to run with VS2013 (the express version is fine). Also, instead of clicking save in the blueprint do you get the same behavior if you use the File->Save All feature? This should save the blueprint as well.


Doug Wilson

avatar image ioJoss Oct 29 '14 at 10:06 AM

Hi Doug, thanks for your reply.

Yep, I'm using 2013 Premium. I don't know if Save All exhibits the same behaviour. We could find out though - my repro steps are right here ;)

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

1 answer: sort voted first

Hey ioJoss-

I've reproduced this crash on my machine and have submitted it to our internal tracking system for further investigation. For the time being, if you close and reopen the editor after the second hot reload, you should be able to access the blueprint without the crash.


Doug Wilson

more ▼

answered Oct 31 '14 at 06:11 PM

avatar image d4rks1gm Sep 08 '18 at 01:40 AM

Was this ever fixed...? This is happening to me.

(comments are locked)
10|2000 characters needed characters left
Viewable by all users
Your answer
toggle preview:

Up to 5 attachments (including images) can be used with a maximum of 5.2 MB each and 5.2 MB total.

Follow this question

Once you sign in you will be able to subscribe for any updates here

Answers to this question