Hi, I seem to have a problem with my model and cant figure out where this is coming from (neither can my boss).
As I am fairly new to abaqus I would kindly ask you to use "simple" language when explaining what to do.
There can be various causes of this error, it's impossible to say exactly what's wrong without seeing the model. But you know the location (assembly_pickedset15) so check the definition of that boundary condition and try redefining it (or the node set used for it). See if there's anything special about it. Is it a reference point ? If yes, maybe it's not properly connected with the model.