Exporting A Tank As .stl Problems

[Anonymous]

When i try and Export>other formats, it asks you to select a solid or watertight mesh. 

Are tanks that Plant 3D generate not a solid or mesh?

ill try and dig around, but if not, is there a way to convert it to a solid or mesh?

Thanks!

[Anonymous · Accepted solution]

Fix'd

It was grouped and it didnt like something in that group.

once exploded, it worked just fine.