compiler error, c++

I am implementing an octree tree in c++ using visual studio. When i call the build function i get this error:

error C2664: 'BuildTree' : cannot convert parameter 5 from 'overloaded-function' to 'int' 1

this is the line that i get the error:

B开发者_JS百科uildTree(parent, 0.0 , 0.0, 0.0, length , maxLevel,0, 0.25);

and the function is this:

treeNode * BuildTree( treeNode * parent, float xx , float yy, float zz , int length ,int maxLevel,int val,float threshold)

Can anyone help me to correct this error?

There is probably a function named length accessible in the current scope when you call the BuildTree function.

Is length a variable or a function name? Did you mean to call length()?