John, I agree with everything you have said. I was merely trying to help find the element where the error occured. I had the same problem yesterday and I am still trying to resolve it. Some times the error message is not precise. So, as you said, it is probably associated with stiffness matrix...
I would like to offer some advice on how you may be able to find the problem area when you get the flexibility matrix singular message.
After the run error message,
1. Click on report and then summary. Then go to bottom of file. There you will see the location where the error occurred and...
