When I try to load up the game, it doesn't work. I've been searching around the website about an hour now trying to find my problem on FAQ. I cannot seem to find it. Is anyone able to help me please?

Here is what my patcher thingy says:

DataFile, adata.grf open error (R/W)

So I hit start game and this is what it pops up:

Load MapInfoTable Failed!
Unable to load table class_tab.txt

Someone please help me, I use to play this and I quit because I started to get into WoW heavily. Now I am back since I got my WoW guy lvl 70.

Make sure your only installing the full version client.

Make sure your adata.grf is getting installed properly and make sure you have enough harddrive space.

Hello, I too am getting this problem. How do I know if the file is being installed properly? I've reinstalled twice now, still no luck. Perhaps you might know why?

Read and write errors usually mean your computer is not able to write to adata.grf.

Make sure that there is not another program using RRO's adata.grf file before running the patcher. Make sure you are able to write to the RRO folder and it's files. (Usually an issue with Vista users and... non administrators playing RO a restricted user account)

Once your adata.grf file is able to read and write, you should be able to patch it. For some reason, installing to
"C:/Ragnarok Revolution"
Did me much justice, or I must have did something I couldn't remember.