These errors are not complicated, just look at what they tell you. You are posting in scripting help so I assume you are scripting the fixes yourself.
You have 2 functions with the same name, which you cannot do. How is the compiler supposed to know which one you want to call?
PHP Code:
public WallClimb(id, button)
public WallClimb(id, Float: iOrigin[3], Float: fNormalVector[3], button)
This error is a result of that, as it's thinking you want to use the first one:
Code:
Error: Argument type mismatch (argument 2) on line 83
Same variable defined twice Up_Velocity, similar issue as the duplicate function definition:
PHP Code:
new Float: Up_Velocity;
new Float: Final_Velocity[3], Float: Up_Velocity[3];
There's no function or macro defined as 'Z', so not sure what you're doing here:
PHP Code:
fl_Velocity[2] = Z (EntOrigin[2]- VicOrigin[2]) / fl_Time
Fix these issues and report back