Local variable default values reset in function library

Development Programming & Scripting
1

I have a function in a function library that is supposed to return a skeletal mesh. I set up an array as a local variable that contains all the possible return values as its default. When I run the game and debug the function, the array is just filled with None values (ie it has the correct length but each value is None instead of the meshes I set up as the default). I’ve also found that if I create non-array variables they are reset as soon as the function library is compiled.

This happened with all the variable types I tried in the “Object Reference” section of the type dropdown, but not with any of the other categories.

2

Hello kgamble,

I was unable to reproduce this issue on our end. I tried setting up a function library and I created a local variable (float). I then tried printing this value to the screen and received the default value that I had applied. I have a few questions that will help narrow down what issue it is that you are experiencing.

Quick questions:

  1. Can you reproduce this issue in a clean project?
  2. If so, could you provide a detailed list of steps in order to reproduce this issue on our end?
  3. Could you provide a screen shot of any blueprints that may be involved.
3

This doesn’t happen to float or any other type that isn’t an ObjectReference type (eg material, skeletal mesh, etc). To repro this in a new project:

  1. Create a material
  2. Create a function library
  3. Add a function to the library
  4. Add a local variable to the function in the library
  5. Change the type of the local variable to a material
  6. Select the material you created in step 1 as the variable’s default value
  7. Compile

Some screenshots from before and after I compiled the function:

49690-precompile.png
49690-precompile.png1365×767 134 KB

49691-postcompile.png
49691-postcompile.png1365×767 129 KB

4

Hello kgamble,

I was able to reproduce this issue on our end. I have written up a report ( UE-18404) and I have submitted it to the developers for further consideration. I will provide updates with any pertinent information as it becomes available. Thank you for your time and information.

Make it a great day