I was trying to figure out why the RF power block was not appearing after an upgrade even though I still saw it in the source as available, and after a bit of digging I noticed a change in SGCraft.java

rfIntegration = (RFIntegration) integrateWithMod("forge", "gcewing.sg.rf.RFIntegration"); //[RF]
rfIntegration = (RFIntegration) integrateWithMod("redstoneflux", "gcewing.sg.rf.RFIntegration"); //[RF]

I am not too familiar with the mod ecosystem, but it looks like dropping away from forge energy and going back to redstoneflux means the power is no longer as easily transferable? In fact, only by installing the redstone flux mod directly was I even able to get the RF power unit block to come back. It no longer accepts power from IE machines.

My mod set does not include Industrial Craft nor Computer Craft. Immersive Engineering is the only power producing mod, and my prior version does work with IE power directly.

Can that be easily changed back to "forge" or use both without breaking other things?

@ErikaRedmark what version are you using that saw that issue?

I need details, what you gave didnt help any.

I have not the old Minecraft setup I had when I made this issue, and it's been many months since I rather abandoned what I was doing, so there's nothing more I can recall. I simply don't remember what version it was nor do I have it anymore.
Because this is no longer anywhere on my radar, you can go ahead and just close this ticket.

I'm sorry I have not been using Minecraft recently and do not recall exactly.

I do remember the release on the discord channel that you posted working properly however. The version I saw the issue with was the one right before that special discord released version.

Try the SGCraft-1.15.6-forge-release.jar that @Dockter posted to the SGcraft Discord server (SGcraft general channel on 9:47EST on Sept 5th.