Does SQLTCPExhItemSender ring a bell?

I try to run the creation steps for a TW application on our DEV environment and I get this error:

 

An unknown error occurred while executing '/* Create or alter stored procedure saveAttachment. */

create or alter procedure saveAttachment
    @directory_path   exh_parameter_nvarchar   ,
    @file_name        exh_parameter_nvarchar   ,
    @byte_array       exh_return_binary   ,
    @overwrite        exh_no_yes   ,
    @output_path      exh_information    output
as external name SQLTCPExhItemSender.UserDefinedProcedures.saveAttachment;
'. 

Error: 'Assembly 'SQLTCPExhItemSender' was not found in the SQL catalog of database 'BRB'.'.

I wonder if this is still required, it appears this is a DLL file used to extract the attachments from an email.
Is this something that comes from Thinkwise or is this something a former colleague of mine thought up before I was working here?
I seem to remember we have had issues before with emails when the customer started using the new Office 365 outlook interface. We had issues when the user would try to drag an email from Outlook into the Thinkwise application, I suspect that this SP is part of that solution?