Minecraft wiki entry for Reporting_Tectonicus_Bugs, associated text: Are you using the latest version? (check the forum thread for a newer version) (todo: instructions on how to check version number)
Have you got java installed? (todo: instructions on how to type 'java -version' and see what is installed)
Have you double checked your file paths? 99% of errors are misspelt paths or missing spaces in paths, or failing to surround paths with spaces in with "quotes"