Exception thrown when trying to set targets for baseline region

[Anonymous]

Hi all,

I have got an exception "The SubassemblyTargetInfoCollection is not got from the BaselineRegion." while trying to set targets for a baseline region of a corridor. I searched online and found the following posts, however none of them is able to help.

Post I have found online:

https://forums.autodesk.com/t5/autocad-civil-3d-customization/corridor-target-assigning/td-p/4642747...

https://forums.autodesk.com/t5/autocad-civil-3d-customization/subassemblytargetinfo-targetids-error-...

https://forums.autodesk.com/t5/autocad-civil-3d-customization/set-targets-to-baseline-and-baselinere...

http://civilizeddevelopment.typepad.com/civilized-development/2013/05/subassembly-targets-having-fun...

My goal: to set a subassembly(LaneSuperelevationAOR)'s offset target to an alignment and elevation target to the alignment's profile

My code: THE EXCEPTION HAPPENS AT THE LAST LINE OF THE FOLLOWING CODE. THANK YOU IN ADVANCE FOR ANY HELP.

 // set subassembly targets
 SubassemblyTargetInfoCollection targets = centralCorridor.Baselines[0].BaselineRegions[0].GetTargets();
 foreach (SubassemblyTargetInfo target in targets)
 {
       if(target.TargetType == SubassemblyLogicalNameType.Elevation)
       {
       ObjectIdCollection ids = target.TargetIds;
       ids.Add(ProfileId);
       target.TargetIds = ids;
       }
       else if(target.TargetType == SubassemblyLogicalNameType.Offset)
       {
        ObjectIdCollection ids = target.TargetIds;
        ids.Add(AlignmentId);
        target.TargetIds = ids;
       }
       else if(target.TargetType == SubassemblyLogicalNameType.Surface)
       {

       }
   }

             centralCorridor.Baselines[0].BaselineRegions[0].SetTargets(targets);

[Anonymous]

If anyone could provides a workaround, that's great too! Tons of thanks!

[Anonymous]

I tried to commented out the for loop and still have the same exception.