PLS-00587

Error: PLS-00587: a static method cannot be invoked on an instance value

Causa: An attempt was made to use an object instance value, not a type name, as the qualifier of the name of a method invocation, but only a type name can be used as the qualifier when calling a static method.

Acción: Use the type name, not an object instance value, to qualify the name of a method if the method is static.