Trying to do my first procedural generated map, problems.

[Outcast]

Your method doesn't crash for me when I set X dimension index to 0 in the same event that adds 1 to the Y dimension index.

Ah that is true thanks

So now I am trying to do the next step, actually digging out the map and then writing it out. But I dont seem to get it right :/ I have managed to write out blocks on the whole "map" by adding blocks to all array cells with the Id 1. But when i try to do this digging part nothing is placed out..

Is there any tutorials on these things?

"CREATE THE MAP
The first thing that my generation code does is create a 2D vector (array), containing ID’s (integers) of the different types of cells. To start, I create a 400×300 size grid, all with the value “1″. In my case, ID=1 stood for walls, and ID=0 stood for empty space (titled floors, even though they’re not, really). Later on I add Water, which is ID=3, but that’s not important right now.
THE MINER
Once the map is created, I then create a “miner”. In my case this is actually just called a “Cell”, but it makes more sense if you consider it to be a miner. The miner is created in the center of the map (200×150) and is labeled as “active”. When generating the map, I create a loop that goes through every active miner, and runs their “dig” function. When the miner “digs”, it picks a random cell around it, that is not yet an empty space (ID=0) and digs it out, moving itself in that direction.
For example, if the miner was at 5×4, and decided to move UP, it would dig out the cell 5×3, and move itself there.
Whenever a miner digs, it also has a small chance of spawning a new miner in a random direction. In my generation code, the chance is about 8% that a new miner is added.
If a miner has no walls surrounding it (ID=1) then it unactivates itself, and stops digging. If this miner happens to be the last miner alive, then it just moves around until it finds a new wall to start digging."