I get that you want help and your encountering an error but Im gonna suggest maybe breaking it down into smaller parts and giving a bit more detail.
For example, I had an error earlier, "Error 118 -Subscript for Array is out of bounds at line 46648" Is your error in a similar syntax?
From what I gather these are array table errors or something, as far as i can figure out when fpsc builds a game it builds a table, telling it where to go when looking for other things, I could be totally wrong this is just how I understand it, so when your game is looking at that table for a specific value at a specific line, its not finding it and throwing up an error.
For me it was related to a specific script command at a certain point in the level.
Does your error occur when you do something specific or when a specific action or entity is activated? Is it on level load? is there something in the level it crashes on that isnt in other levels?
Im no coding wizkid but I do know a little and if you need help then you really need to provide more information or no one will know how to help.
**edit**
Just looked at the picture, Ive NEVER seen that before, just a text box with the number 13 in it and 'dark basic pro enhancements pack' in the message title bar.
Damn thats weird. Someone more versed in DarkBASIC might wana take a look at this 0.0
smoke em if you got em