MarkHirschi thank you for the reply.
Can you clarify what you mean by "If you have slabs meshed at visible gridlines, but not at lines". In my model I have meshed slabs to all primary grid lines
What exactly are null lines? I have a large building modeled in ETABS Nonlinear with many gridlines and I have been recommended to convert some gridlines to null lines to decrease computational time and increase efficiency. What is the criteria for utilizing null lines and how are they...