dont bother.
its rubbish and gives you a headache
Intergraph works ok for simple single lines, after you have your IT group spend 3 months ironing out the bugs, and importing/exporting patches etc.
I had an engineer get down on both knees and beg me to let him model the lines from scratch, rather than use the PDMS data.
I couldnt argue with him.
The whole process is a bit like Dating(Courting), after a few pints in yer local pub, it seems a great idea, easy and with guaranteed results, however in reality, you end up in a dark alley covered in puke and wondering where it all went wrong.
Not trying to put you off or anything