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"

Office Holiday

Epic Games' offices will be on holiday from June 22nd to July 7th. During this period support will be limited. Our offices will reopen on Monday, July 8th. 

Error: FMatrix::InverseFast() In Blank VR Project

So, for the life of me, I can't figure this one out. I thought my main game project was out of whack since I migrated from 4.15 to 4.17. But, I just created a blank VR Template project and opened up the MotionControllerMap and viola this RedScreen of Death shows up:

alt text ErrorText

Steps to reproduce:

  1. Create blank VR Template project

  2. Open up MotionController Map

  3. Hit VRPreview (this is on a Rift CV1 btw)

  4. Exit and look at logs

Definitely something to do with VR, since I just tried FPS template and that's good. Guess I'll look at the MotionController BP and pawn to see if something's out of whack that got missed in this release.

And this is from my project: alt text

Happens 8 times when I hit play in my project, only once in blank VR Project... So maybe I have something that the Blank Project has, 8 times/calls in mine (can't find it, seems like it's 4x per one object)...or just some random freakiness going on.

Product Version: UE 4.17
redtextofdeath.txt (11.3 kB)
more ▼

asked Sep 05 '17 at 11:20 PM in Bug Reports

avatar image

2.4k 60 27 111

avatar image VictorBurgos Sep 06 '17 at 12:03 AM

Teleport controllers are the culprit. What exactly, still to find out...

avatar image VictorBurgos Sep 06 '17 at 12:30 AM

Roomscale Outline is op.

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

2 answers: sort voted first

Hmm, so SetupRoomScaleOutline doesn't play well with Rift for obvious reasons, since it's looking for SteamVRChaperone, but I'm using Oculus app, so, I just did a quick GetHMDName and if Rift, moved around it for now, letting Vive set it up. I'll come back to this later.

more ▼

answered Sep 06 '17 at 01:00 AM

avatar image

2.4k 60 27 111

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

Having the same problem here. My VR project crashes in the SetupRoomScaleOutline function with the same output. In the logs there is also this error:

 Ensure condition failed: false [File:D:\Build\++UE4+Release-4.16+Compile\Sync\Engine\Source\Runtime\Core\Private\Math\Matrix.cpp] [Line: 8] 
 FMatrix::InverseFast(), trying to invert a NIL matrix, this results in NaNs! Use Inverse() instead.

alt text

Looks like if Steam VRChaperone was not valid.

crash.jpg (74.4 kB)
more ▼

answered Sep 21 '17 at 11:59 AM

avatar image

71 6 10 17

(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