Blender 2.8 rig not fully working on 2.79 Hey this may be a silly question but when I made a rig in blender 2.79 (I didn't use rigify) I saved it and opened it on blender 2.8 and by a habit I saved it and now I tried to open it using blender 2.79 and it didn't work when I try to open blender 2.79 it crashes but it still works on 2.8 and I tried the append trick but only parent bones worked 
But the child bones worked when I selected it from the outliner tab 
How can I fix this?
Blender files created with newer versions of Blender should not be opened in older versions of Blender, especially with Blender 2.8 as a lot has changed. What I recommend is having more than one version of Blender installed and/or exporting models and using them in your scenes with newer or older versions of Blender (use DAE format, etc.).