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Getting lots of TrashClass errors while building project!

Hi, I get lots of these on several different blueprints during the build! I saw a few posts here and there regarding the TRASHCLASS and was wondering if this is the same unsolved issue or something else. Would be great if anyone has a solution.

UE4Editor-Cmd: [2015.12.08-06.56.38:515][ 0]LogBlueprint:Error: [compiler BP_Rotator_Child_Watcher] Error This blueprint (self) is not a TRASHCLASS_BP_Actor_Master_321, therefore ' Target ' must have a connection.

Product Version: Not Selected
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asked Dec 08 '15 at 07:11 AM in Packaging & Deployment

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avatar image Adam Davis STAFF Dec 10 '15 at 07:00 PM

Hi WorldofPolygons,

  • What steps are you taking to reproduce this on your end?

  • Which specific blueprints seem to be affected?

  • Do you have any circular references within these blueprints?

  • What device are you attempting to package to?

  • Does this occur in a clean, blank project with no additional content or is it limited to one project?

  • What engine version are you currently using?

avatar image Worldofpolygons Dec 13 '15 at 08:44 PM

Hi, the strange part is that I get absolutely no error or warning when I compile the individual blueprints. I am using version 4.10.1 but had the same problem on 4.10.0. I am building the package for windows. When I restart the machine and open the editor. I can compile the project with no error. but right after that if I rebuild I get the errors ! Errors are related to nested child blueprints. Parent class uses a blueprint interface and these child blueprint which inherit the parent functions overwrite some of them.

I can successfully build an empty project.

Any suggestion on how to tackle this would be great!

avatar image Adam Davis STAFF Dec 14 '15 at 03:47 PM

Check to see if you have any circular references in your blueprints that could be causing the error. In many cases the cyclical dependency can be fixed to prevent compilation errors upon building/loading. If this is not the error, please post back with a screenshot of both your parent and child blueprints so I can take a look.

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Hi Worldofpolygons,

We have not heard from you in several days. I am marking this as answered for tracking purposes. If you are still experiencing this error, please comment with the requested information.

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answered Dec 18 '15 at 05:24 PM

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