The debugging mode commands are clear and concise. Briefly, natural number n excludes the n-th species from the model, [m n . . . ] excludes all species except for the m-th, n-th, . . . (the number of species in square brackets is not limited), :n sets the number of iterations after which the program automatically switches (back) to the debugging mode to n (implicitly n=100), &n x sets the value of the n-th unknown parameter to x, |n transforms the stability constant of the n-th species from the "natural" to the logarithmic scale (and back), r and R perform "small" and "big" restart, q and x terminate the program (q saves an image of the computation to the output file), dot . and comma , switch the debugging mode off (each in a slightly different way). More commands can be found in the reference manual.

If two or more commands are given in a single sequence, they are processed sequentially from left to right and, at long last, the next (at least one) iteration is accomplished. Hence, the sequence of commands 1 2 3 is equivalent to 5 3 1. If you want to exclude the 1st, 2nd, and 3rd species from the model, you have to set either 3 2 1 or 1 1 1.