Symmetrical Modelling

I recently modelled a character in blender using symmetrical modelling, however when i went to join the two halves together, the seems did not dissapear. I have made models using this system before and have never had this problem. Could anyone suggest what might be stopping the seam from disappearing?:frowning:

Remove Doubles and/or internal Faces.

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Also, make sure to select all the edges along the axis of symmetry, scale them to 0 (ie is you’ve modeled mirroring the x axis, select the seam edges then scale > x > 0) and remove the doubles.

Is there a function for removing internal faces or must i do it manually?