COBCH1715 Best visible overload found in <type-name> is <member-name> which has invalid parameter <param-num>

In the following example, there is no compatible match for the call to messageEnd using the arguments supplied. There is a method with the correct name and same number of parameters; however, the second parameter is not a compatible match. Either change the second argument to be compatible with a decimal type, or change the messageEnd method to accept a type compatible with a string as its second parameter.

class-id myClass.
method-id main.
 invoke self::messageEnd(4 "Installation Complete")
end method.
method-id messageEnd (s as decimal t as decimal).
...
end method.
end class.

This error is produced in a context in which either a static or an instance method would be allowed.