Since 1.18.1 I cannot send the blocks to be put in denylist with InterModComms.
In 1.16 it worked, I don't know if anything has changed since 1.18. The code is called in the FMLCommonSetupEvent:
https://github.com/Edivad99/ExtraStorage/blob/26f7650a7dd3774edcc9e55322de10712b281236/src/main/java/edivad/extrastorage/setup/ModSetup.java#L64
This is where I send the info with InterModComms:
https://github.com/Edivad99/ExtraStorage/blob/26f7650a7dd3774edcc9e55322de10712b281236/src/main/java/edivad/extrastorage/compat/CarryOnIntegration.java

Minecraft version: 1.18.1
Forge version: 39.0.9
CarryOn version: 1.17.0.5

strange... I didn't change anything about that really. Did it work in 1.17?

Also, I didn't know anyone even used IMC for CarryOn :D This is the first time I'm hearing of it

I don't know, my mod is a refined storage addon that was not developed in 1.17, so I skipped 1.17 development

Ok, I fixed by using the tags

CarryOn is using FMLDedicatedServerSetupEvent to process IMC stuff, but - according to the 1.19 docs - this event is called before InterModEnqueueEvent. Also I'm not sure whether dedicated server events are fired on integrated servers. IMC messages should be handled in InterModProcessEvent instead

Also, I didn't know anyone even used IMC for CarryOn :D This is the first time I'm hearing of it

Thanks for adding the IMC stuff, I'm very happy it's there :) This thread gives me hope that maybe someone out there will ever use the API stuff I've been supporting, haha

edit: also, the wiki page https://github.com/Tschipp/CarryOn/wiki/IMC-support-for-Modders was super helpful! The 1.13 example "works" for 1.19 (for sending messages... hopefully in the future they will get processed)

When calling InterModComms.sendTo from the enqueueModComms event, it does not work for me. But it does work when I call it from within the initialization. (1.19.2)