Please go back and look at your initial posting to this thread. You said that the datatochange.txt line:

Code:

sw1135g.sps 2657.00 7305.00 2 1

was supposed to change the line:

Code:

S 2657.00 7305.00 2V1 0.0 0 0.0 420124.9 2571324.9 153.7297152126

to:

Code:

S 2657.00 7305.00 1V1 0.0 0 0.0 420124.9 2571324.9 153.7297152126

which is a change in output column 19 (not 24).
And you said that the datatochange.txt line:

Code:

sw1135g.xps 2657.00 7305.00 2 1

was supposed to change the line:

Code:

X 5822 241L 2657.00 7305.002 1 2401 2586.00 7186.00 7425.001

and several similar lines to:

Code:

X 5822 241L 2657.00 7305.001 1 2401 2586.00 7186.00 7425.001

and several similar lines all with changes in output column 28 (not 38).

Did you look at the header above the text box where you entered your question? Among other things it says:
If you mean that your input had tabs or multiple spaces in it that you didn't protect with code tags; that might explain why elixir_sinari gave you changes to the wrong output column for the changes to these files. If you want a general solution, you'll have to specify the output column to be changed in the datatochange.txt file and use code tags when showing us sample input and output files.