Object: PSYS error: rule 14 error, PSYS_SRC_TARGET_KEY needs key data Object: PSYS error: rule 20 error, PSYS_SRC_TARGET_KEY needs key data errors (occurred separately on different scripts) when changing a standard lsl2 script with particle controls to mono, occurred on every particle based script I tried this with) In at least one case script began to work correctly then stopped giving the error in error console. The same scripts work fine in lsl2 but fail immediately when switched to mono, my theory is that mono is trying to handle the target key in a way that's breaking it in a way so that it isn't understood. removing PHYS_SRC_TARGET_KEY is a workaround however that is needed for any scripts that use a particular target for the particles so not being able to use it will break a lot of content.