Pointer value assignment replaced external pointer. An attempt was made to access data through an undefined pointer. The data type specified does not exist. Invalid use of pointer. An empty pointer cannot be offset. Can not offset a pointer to be greater than the size of the data pointed to The datatype and size of the value must be defined before the value can be retrieved. Type was not found. Only libpointer objects can be passed to this PtrPtr type. Pointer type must match data type Pointer value must have same size or larger size than the new value. Pointer types must match data type. Array must be numeric or logical or a pointer to one Complex data is not supported in libpointer objects Parameter can not be converted to a character vector