I have a horizontal layout for my merges and diverges, with dimensions per DMRB CD 122, as follows:
I have found in several instances (3 out of 8 layouts in my current design), that no matter what I use for the final element, either using Arc Between Elements > Simple Arc or Arc Between Elements, or what order the elements have been selected as back and ahead, when the mainline reference is reloaded, or simply upon opening the model at the start of the day, the horizontal solution glitches, either giving the "Invalid Element. Uable to solve rule please correct element construction" error message or moving the acr to a different solution location.
The designed solution (north radius is 500m due to the mainline alignment in this situation):
Once refreshed:
The glitches can be resolved by selecting the complex and amneding the arc value to R1001m and then back to R1000m, or by dragging the arc midpoint grip, but I cannot find a way to prevent this glitch happening.
Does anyone have a similar experience and a way to prevent this happening?
Anybody? Because I'm pretty sick of having to fix this exery time I open the model
I would make sure that you never use the persist snaps tool on the feature definition toolbar. I always turn that off as soon as the program starts and have found it fixes most issues like you are seeing.