Help with console errors (custom modpack)

[UndercoverQuasar]

Hi, I am helping make a custom modpack for a small server and we are getting some errors in the console whilst loading. The game loads fine but I don't know if the errors will cause problems later on.

Here is the pastebin containing the entire startup log.

http://pastebin.com/wyQJDhqv

The main ones are the fatal plugin mekanism error and something about a buildcraft tile api.

Thanks very much for your help.