I get the -nan(ind) error during final stress check whenever I provide temperature load for the girders. Is there a solution to this issue? I am using LEAP Bridge Concrete CE 19.02.00.33.
This type of error message was seen previous versions of LBC.
I would suggest you to download the latest version V20.00.0046.
then re run the analysis and re design the girders.
I hope it helps.