Are you using a custom race? If so, it's not compatible, put in a race request on the issues If not double check your research, access and availability of medicine/organs/etc in your stockpiles. If you still continue to have issues something is borked, put in a bug request in the github instead. Pawns without any existing health conditions will be fine. Anyone with a health condition will have lots of body parts missing, However most of these are just my extra slots for new organs, so having them be missing is alright. However, some implants like anything on the legs will be shuffled. Ex: I tested giving a pawn archotech legs, eyes, and arms. Upon adding my mod, all the extra slots that I add show as missing, but the waist and legs are now removed. The tag for archotech legs went to the left femur and right lower shoulder. This however, can be fixed with use of the dev mode's remove hediff and add hediff controls. Read above. If you are still having issues, double check your research and/or the item description, if that doesn't seem to help you, post in the comment section or put in a question request on the github. Disable all other mods with the exception of Evolved Organs. If the warning persists, put in a bug report at the github. If the alert does not persist, enable mods with known compatibility with Evolved Organs. If the warning re-appears, put in a bug report. If not, continue to enable mods until the warning reappears. The latest mod enabled has a compatibility issue with Evolved Organs. Put in a compatibility request at the github. Potentially, put in a request at the github. Sure, please let me know so I can adjust the compatibility list accordingly. Sure, make a fork on the github, tinker around and toy with what you want. Make a pull request with your changes. Please make sure to comment your code. If I approve the pull request, it will be merged into the dev branch for testing and rolled out during the next steam drop. If your an artist looking to contribute, I could use some sprites for the organs in the near future. Contact me via steam, discord or the github and I'd appreciate working with you.