Thanks for the reply, Mark

This is a web application with links to binary attachments, that are stored as streams.  The streams are accessed via links on the page, and return the stream based on the OID generated (at present these are FileStreams, and the OID is pointing at the path on the FS).   I'm seperately looking to move these streams into GlobalStreams, to reduce some of the complexity around the file storage.

A follow up question.  I was able to push across a small filestream using my REST services, with the file stream encoded in BASE 64.  I then tried a large file, and received a MAXSTRING error.  I clearly need to use Streams to get round this, and was looking at the class documentation.  I believe there aren't Stream capable versions of the following functions, but I thought I'd ask here before I started coding:

1. Base64Encode (and Decode)

2. toJSON() (and fromJSON)

Thanks Tomas, I will rewrite my class to use the %GlobalCharacterStream

Great, thank you both!

Fantastic.  Thank you both for your help.  I will migrate over to using %Object instead

Fixed it.  Was setting that property, but to "true" rather than to 1.  Rookie mistake