Constructor used to work well in DOSBox 0.72.
It doesn't work at all in 0.73.
You can see the error message in the uploaded image.
I am using Windows Vista Business, SP1, Intel Core 2 Duo @ 2,10 Ghz, 4 GB RAM.
I am not very sure, but I think I downloaded from http://www.abandonia.com/en/games/369/Constructor.html
Let me know if you need more details.
I am using the cvs tag for this bug because there is no tag for 0.73.