Learning Forum

[jannagim]

I am trying to apply an acceleration to a constuction, but when I solve I get the error message "structural steel contains invalid property data". When looking at the error message it tells me that density is required, but is undefined. However, I am using the default material structural steel, from the material library, which should already have a defined density? Why am I getting this error and how can I fix it? Applying forces to the model works fine, but not acceleration.

[peteroznewman]

You must have deleted the density property from the material at some point.

You can add the density property to the material by drag and drop and type in the value in the proper units.