Invalid text, ntext, or image pointer type. Must be binary(16).

The error message
Msg 7122, Level 16, State 1, Line 5
Invalid text, ntext, or image pointer type. Must be binary(16).
is generated at run time when you try to use a variable of an invalid type as pointer to a blob column. To solve the problem make sure that the variable that points to the blob column must be of the type BINARY(16).