Weight Adjustment of "Paint tools"

[tubetone]

I would like to know weight adjust by using the "Paint tools" of Softimage Mod Tool.

 

I select bone and mesh and then push palette icon within Paint tools box.

I export the dotXSI file.

 

I have an error "Surface '' has 5 bone weights, max is 4" on carcass.exe

 

How can I do to adjust weight with Paint tools without carcass error?