Trouble UV Mapping

[ordoboy27]

First of all, I am not very technically inclined so bare with me. I have been trying to do a UV map of one of my models in segmenting mode and I am having problems. I assign the AUV Charts, than I click Continue, than Unfolding. Than I get an error message that says: A closed surface cannot be mapped. How do I fix this?

 

[Rath0s]

Go through the model and make sure their are nothing wrong with it, for example check if all vertices are connected (the dots), then try to uv map.

 

[Lumos]

Or mark some edges to be cut.
Finally, you can use this if it's for something symmetrical (like a weapon).

 

[ordoboy27]

Okay cool, thanks.