Point Control chronically rejected by Circular Dependency

Question

I have a chronic issue in several projects, in several corridors. Almost every time i try to use point controls to tie a corridor to another corridor, or to tie a corridor into existing ground, the control is rejected as a "circular dependency". Some times I can get it to work by deleting a line and redrawing it, or deleting a corridor and redoing to template drop. Locking profiles, removing rules etc. will sometimes solve the problem. Some times there seems to be no way to solve the issue. This happens very regularly, I have everything i can think of, there seems to be no good way to consistently use pojnt controls. 
 What are some best preacticies that would help me avoid circular dependencies?

Jacquelyn Pettus · Answer

Paul - I was able to resolve the issue by deleting all three template drops. I recreated the template drops using the template from the ITL you provided. Then, I edited the middle template drop to have the TIE point. At that point, I was able to add the point control. I am still stumped as to why it wouldn't work before, but I think it may have had something to do with snapping to elements when you picked your start/stop stations in the template drops. Instead, I keyed in each of the station values. Please give this a try and let me know if it works for you. I can provide you with my files if you need to see them.

Adam Wieczorek · Answer

It will happen when you add keyin station, point control, end condition exception, parametric constraint, template drop with snapping to any of corridor object (eg. edges of pavement). Design Intent tries to rememeber a rule but the rule depends on corridor results. Software should not create design intent rule when it would create circular dependency. It will also happen not only with snapping to corridor object - you will see this behaviour when you use Civil Accudraw with coridor elements as refeneces or orgins. I believe it was fixed in SS4. You can now snap to corridor object and it will remember only the station/offset and not the rule.

Point Control chronically rejected by Circular Dependency

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