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Crashing blueprint

Whenever i try to compile this blueprint, the engine crashes. If i save it and try to edit it, the engine crashes there is something wrong, an error or something else that could cause that? alt text

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asked Apr 20 '15 at 10:49 PM in Bug Reports

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avatar image ale929 Apr 20 '15 at 11:58 PM

Anyway if i dont use the "on component end overlap(Salire)", the one connected to set collision enabled, i dont get any error... everything perfect but i dont get the collision back. "Salire" and "Scendere" are two normal boxes.

avatar image TJ V ♦♦ STAFF Apr 21 '15 at 03:12 PM

Hi ale929,

I just wanted to reference your other post which has the crash reporter info. I'm looking into the issue and hope to post back soon.

avatar image TJ V ♦♦ STAFF Apr 21 '15 at 03:33 PM

I haven't been able to reproduce your results yet, I need some additional info.

  • Which version of the editor are you using?

  • What blueprint is this contained in (character bp, generic actor bp)?

avatar image ale929 Apr 22 '15 at 07:04 AM

Using latest version, 4.7.6, but i had the same problem in 4.7.5. The blueprint is a generic actor bp (a sprite with two boxes for overlap events)... i tryed this on a new project and it seams to work so i dont understand what could be that makes me crash on my project.

avatar image TJ V ♦♦ STAFF Apr 22 '15 at 12:19 PM

Has your project been converted through older versions of the engine? If to, which ones?

Also, have you tried recreating the blueprint from scratch inside of your project? If that still crashes, try creating it in a new project but inside of the same engine version. Then migrate it to your project.

avatar image ale929 Apr 23 '15 at 06:05 PM

The version of the project is the latest... anyway i tried creating a new one and noticed that it crashes just when i use sprites and the boxes are overlapping each other. If i use 3d meshes it's everything ok, i can even let the boxes overlap and i dont get any crash. If i use sprites but the boxes dont touch each other i dont get any crash.

avatar image TJ V ♦♦ STAFF Apr 23 '15 at 06:29 PM

I tried this with multiple overlapping objects with sprites but I still couldn't reproduce a crash. Since you recreated it in a new project, could you post a link to download that project here?

avatar image ale929 Apr 23 '15 at 07:16 PM

It will take a life to update it... ok i'll try. I saved the project with a blueprint of a sprite with the two collision box... if u try to open it the engine instantly crashes just becouse it is the blueprint that i said. In fact it makes me crash when i create it and compile it and whenever i try to reopen it once compiled.

avatar image ale929 Apr 24 '15 at 07:15 AM

http://www.filedropper.com/myproject2 Here is a link of the new project with the crashing blueprint

avatar image TJ V ♦♦ STAFF Apr 24 '15 at 03:03 PM

I'm sorry but our firewall here doesn't allow us to download from FileDropper. I recommend upload it to maybe Dropbox or Googledrive.

Also, since you were able to reproduce the issue in a new project, try repro'ing it in a new project with no starter content. Then upload that. It will be much smaller than the previous file.

avatar image ale929 Apr 26 '15 at 02:49 PM

https://drive.google.com/folderview?id=0BwmPd-rNtaDNZWY3OXAzNDFIdEk&usp=sharing Here it is... it is without anything but the crushing blueprint and the relative sprite/textures... as soon as i try to doubleclick to open the blueprint, it crashes!

avatar image TJ V ♦♦ STAFF Apr 27 '15 at 08:24 PM

Since I'm unable to open the blueprint because of the crash, is there anything else in blueprint other than what is pictured above?

The error seems to be caused by an 'Infinite Loop'.

avatar image ale929 Apr 28 '15 at 08:43 AM

Yeah i supposed it is an infinite loop but i dont understand from what is caused. There is nothing else... just the things in the pictures... a sprite, named rendercomponent, and two box collision, named Salire and Scendere, that overlap each other. Scendere should let me go down from the sprite by using S key and Salire,placed just a little bit under the sprite, should let me come back on. I really dont understand... what may cause a loop? If you want i can try to do a video of me making the blueprint from the beginning, if it can help...

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1 answer: sort voted first

Okay, so I copied all of your assets to a new blank project and it allowed me to at least open the blueprint. The issue is the sprite has overlap events enabled, so when the boxes are overlapping the sprite, they are creating an infinite loop.

If you go into the sprite and disable Generate Overlap Events, it fixes the issue.

alt text

I hope that helps.



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answered Apr 28 '15 at 01:41 PM

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avatar image ale929 Apr 28 '15 at 02:42 PM
avatar image TJ V ♦♦ STAFF Apr 28 '15 at 05:31 PM

Hi ale929,

It looks like #3 has already been answered by Eric from our rendering team. I asked him to also look into #1 and I asked one of our techs that is more familiar with UMG to look into #2.

You should hopefully have a response soon.



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