ComputerCraft has been giving me issues, but only in the FeedTheBeast modpacks. I would download a modpack(i.e Direwolf20 1.6.4 recommended version) and everything seems fine. Then when I place a computer down and right click it. The computercraft terminal screen still pops up but it says "Error mounting Lua/Rom check to see if you have installed computercraft correctly." I have tried everything that my amatuer debugging brain could do. I have gone into my appdata folder and deleted Direwolf20 modpack and tried reinstalling. I've tried redownloading the FeedTheBeast launcher. I have managed to get computercraft working in my regular minecraft but I really want it in the Direwolf20 pack. And the version of computercraft was the same as the one as I used for my vanilla minecraft client(computercraft 1.5.8) For some reason it works on my younger brothers computer though.
Here is the error that pops up in the console
2014-04-13 20:14:31 [INFO] [STDOUT] computercraft: Error running task.
2014-04-13 20:14:31 [INFO] [STDERR] java.lang.NullPointerException
2014-04-13 20:14:31 [INFO] [STDERR] at dan200.computer.core.apis.OSAPI.shutdown(OSAPI.java:163)
2014-04-13 20:14:31 [INFO] [STDERR] at dan200.computer.core.Computer$2.execute(Computer.java:898)
2014-04-13 20:14:31 [INFO] [STDERR] at dan200.computer.core.ComputerThread$1$1.run(ComputerThread.java:117)
2014-04-13 20:14:31 [INFO] [STDERR] at java.lang.Thread.run(Unknown Source)
Here is the error that pops up in the console
2014-04-13 20:14:31 [INFO] [STDOUT] computercraft: Error running task.
2014-04-13 20:14:31 [INFO] [STDERR] java.lang.NullPointerException
2014-04-13 20:14:31 [INFO] [STDERR] at dan200.computer.core.apis.OSAPI.shutdown(OSAPI.java:163)
2014-04-13 20:14:31 [INFO] [STDERR] at dan200.computer.core.Computer$2.execute(Computer.java:898)
2014-04-13 20:14:31 [INFO] [STDERR] at dan200.computer.core.ComputerThread$1$1.run(ComputerThread.java:117)
2014-04-13 20:14:31 [INFO] [STDERR] at java.lang.Thread.run(Unknown Source)