Solid Model appearings as Hollow Model (SW2017)

Hello everyone,

I am having an issue with a SLDPRT file, where the model is "hollow". I had experienced this before and came to this forum for help, but someone just "fixed" the file for me. I still would like to learn and know how to do it myself.

Unfortunately, I cannot share this file on this forum for proprietary reasons so I know it may be difficult to help me. I have imported this said-model from my mother-company (overseas) as an SLDPRT. I need to 3D print this part but when I try to upload it as an STL file, the model is HOLLOW. I am very limited with my knowledge/experience of knitting or whatever other features can be used to resolve this issue.

In the feature tree, I have the model listed as such:

What do I need to do to get this model to be an actual SOLID? Again, I apologize for not being able to share the file.

Any and all help will be greatly appreciated!

Thanks,

Tommy

SolidworksDrawings And Detailing