RE: 2d text spot heights convert to 3D in Powercivil v8i

I have a similar task. trying to make a 2d landscaping plan useful in 3d.
However after following the dat file creation, continually get a blank file created.
It doesn't help that I dont quite understand what is going on re: matching types/ levels, but if anyone may be able to help, would be good.
Andy.