Questions and discussion for this lecture live here. Fire away by hitting Reply below 
Hello Dr Carroll, I have requested two times the completion certificate for this course and I never get a response. It seems there is problem that could be related to the absence of link to request the certificate I had before.
Hi @Tom1961,
Yes I’m aware of an issue with the completion certificate workflow. I aim to have this resolved early on Monday. Will let you know in this thread when it is resolved.
Apologies,
Seán
Hey @Tom1961,
I believe I have now resolved the issue with the certificate issue workflow. There was an underlying problem causing some users requests to fail silently but this should be resolved now.
Please (for the final time 
) request your completion certificate. It should work as expected now.
Apologies again for the inconvenience and thanks for your patience!
Seán
Problem solved. Thanks!
Hello Sean,
I am trying a different type of structure and getting an error as follows
User\AppData\Local\Temp\ipykernel_19848\503722103.py:19: DeprecationWarning: Conversion of an array with ndim > 0 to a scalar is deprecated, and will error in future. Ensure you extract a single element from your array before performing this operation. (Deprecated NumPy 1.25.)
UG[i] = U[c]
Thanks for your help
Hey @selim - yes this is a deprecation warning that now emerges. You can remove it by simply extracting an item explicitly, so…
UG[i] = U[c].item()
S
I have already done that, but I’m having a convergence problem. I’ve tried everything, but my geometry simply does not converge by changing manual entries. Would you suggest any other method?
Unfortunately, convergence is certainly not guaranteed for every structure - solving structures that exhibit highly non-linear geometric behaviour is notoriously tricky. I’m afraid there are no easy fixes that I can point you too.
In terms of other non-linear analysis methods, if, for whatever reason, you can’t take your model into a commercial analysis package, I would explore dynamic relaxation. Unfortunately, I don’t yet have a course on this, but if you have the time, this could be worth exploring further.
Seán
I have access to explicit dynamics tools, but I was hoping to use this one for quick iterations since setting up other ones takes too much time to set up commercial ones. Some automation methods on geometry prep for commercial tools would be a good class.
You must be the first person in history who thought writing your own code was the ‘quick’ option 
.
TBH, with highly non-linear structures, I don’t think there are any quick options - there’s a reason most engineers will bend over backwards to try and assume linear behaviour!
Interesting suggestion re. geometry prep - thanks! You should take a look at some of my Blender related work - this is the tool I use now for all geometry development and preparation. It works really well.
Thanks for taking the course.
S