If you want to get the parent bone name of a bone with "ent_boneparent", it crashes if you give "1" as bone index (bone 1 has no parent). The strange thing is, it only crashes in RELEASE mode, not in development mode. Not even a warning with warn_level=6.

Please find attached my testlevel. First test it in development mode, everything should work. Then publish it, and test it again, it should crash now.

not crash for me in development , but when i release it give a crash.

Thanks, we'll look into that.