I'm an avid fan of the Millenaire mod, but the recent release (3.1.2) have given and odd error when trying to play over the LAN --  that you need to have version 3.1.2 installed -- which I do have on both of my PCs.

 

I went digging through the code, and the author of the mod has set the VersionBounds to "[3.1]".  I dug around in the Forge code, hacked in the value "[3.1)" and was able to launch LAN play after that.  If I'm reading the comments right, [3.1] would restrict you to the version 3.1.  This makes the error message saying that you need version 3.1.2 mighty confusing!

 

I'm not really much of a developer type, so I'm not entirely sure what the best solution is.. but it seems that the error message in ModListResponsePacket needs tweaked to catch this and make it seem less like you've failed to install the mod properly.  Throwing it out there to the community in hopes that someone smarter than me and involved in the project can consider this.  Thanks!

I think that it would be best if you told the creator of Millenaire about that. Since i think that there is little that Forge can do about this kind of issue