S06006

Error Code

S06006

Error Message

The object 'xxx' is neither an XDB connection nor a function definition. RefId: S06006

Probable Causes

This error is raised when calling an object that is not callable. In DolphinDB, only the following two types of objects are callable:

• Functions;

• XDB connection handles (see xdb).

If you attempt to call an object that is not callable, this error will be reported:

def f(x) { 
    return x() // This will not cause an error, as it is not yet known whether x is a callable object 
} 

f(1) 
// This will cause an error, because the Constant 1 is not a callable object 

f(::now) 
// This will not cause an error, because the built-in function now is a callable object

Solutions

As in the example above, if the parameter of f requires a callable object, the argument passed in must be modified to a callable object.