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connection topology error

connection topology error

connection topology error

(OP)
I have a model with a dozen or so connections in it some with regions that have branches, but not all of them. One of the connection pairs in this model come from the same surface model as a previous model that had a successful connection.

I read an answer to a post in a different forum that Blas Molero replied to and followed his advice regarding the edge to surface connection. That resolved my two edge to surface connections, they no longer get an error. The rest are surface to surface connections.

I set up two regions that did not have any branches and picked the elements, not the surfaces, ensuring that the faces of the two regions faced each other. These two regions still give the error "Error Writing Connection Region 250. Nodes defined out of topological order or branching." The errors seem to be fatal. The elements were picked all at once with the polygon pick. All the faces in the region were the same face number.

If I have one bad branching pair of regions, will that effect other regions? I have tried turning off the offending regions and connections and still get the topological error for those regions.

I am using Femap 11.3

Any other thoughts?

tstanley

RE: connection topology error

have you tried the help desk ? sometimes they can be helpful.

another day in paradise, or is paradise one day closer ?

RE: connection topology error

(OP)
Not yet.

I agree that they can be helpful, and have been in the past. I will have to find my GTAC ? numbers. I have also found this forum useful, including your posts. Thanks for the quick reply.

tstanley

RE: connection topology error

(OP)
The help desk did provide guidance. When creating the connection regions there are three radio buttons for choosing the output. When doing an edge to surface connection as in Blas Molero's example it is important to choose the node output. When doing a face to face connection with plate elements it worked best for me to choose the element output. That got rid of the topological error and gave reasonable results. Choosing an output of elements (no faces) gave inconsistent results for me.

tstanley

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