Error codes

What do those error codes mean?

The error codes are printed at the bottom of the sheet that lists the orders inputted, and they are listed as follows --x y z--, where x, y and z are:

x - The section the error occurred in

y - The order number where the error occurred

z - The error itself (see section 10 in the rulebook)

So, for example, and error 10 1 6 would mean:

10 - The error occurred in section 10, Build Ships

1  - The error was in order number 1

6  - The error was 'you cannot build a ship in a barracks' (from section 10.10)