AutoCAD Civil 3D

[#1]

I created a surface and a stream centerline alignment and ran cross sections to prepare to export to HEC-RAS.

I go to Output tab / Export panel / Export to HEC_RAS / and in the table It shows my surface (EG2) and

Site but when I click the alignment down arrow and it shows only "NONE". I selected the greem box to pick my

alignment and it apeared to pick it but it does'nt show my alignment called "CL CREEK"  in the dialog box.

And it is similar to my cross section options. I went ahead and tried to export it but my GEO file has zero bytes

Thanks John Wilson

[#2]

I suggest you search the news group on the topic. There are several posts about problems with this tool. I personally decided not to invest time trying to work through the problems.

[#3 · Accepted solution]

Did you try playing with the Site dropdown. The Alignment may have been put in a Site that you didn't expect?

[#4]

Thanks Fred for responding

My drawing has several sites. I went thru some of them but I'll go thru all.

Thanks again

John

[#5]

Yes, make sure you look under <None> also there.

Many times Alignments are not placed under any Sites, so they don't interact with other objects.

[#6]

Anybody knows how can I export a designed work (let's say a designed surface) for Hec-RAS (.geo format) Is it possible to do it or not, and if it is what are the steps?

I know how to export an EG to hec-ras! 

[#7]

There's no difference between an EG surface and a Design surface in the eyes of Civil 3D. Just export the design the same way you would export the EG.

[#8]

OK, that's easy, but doesen't work. I mean, it doesent work to me, maybe I do some mistakes, I don't know. Tell me how you do it! Do you make form a coridor a new surface and then you export it to hec-ras or what?

Thank you for response