Use any table with a BLOB field in it (I usually use 99008535 - TempBlob), move the value of the FieldRef to the BLOB field, and then use a stream to move the BLOB field into the BigText variable.
Thanks for your suggestion, the customers license didn't allow the use of TempBlob (99008535) table, but I created another table that matched with the clients license. It worked fine.
Answers
Frank