I’m running into a similar issue when transforming a Purchase Order into an item receipt. I have gone through multiple times trying both dynamic and standard modes and still run into this error when trying to save the Item Receipt. The JSON data for the Item Receipt looks good, I see the inventory detail listed as expected. pr57001, you mentioned you have resolved most of the issues with 2.0 and the inventory detail subrecord; have you resolved this particular one? Any help would be appreciated! If I figure it out before I receive a response I will post it. I’ve been at this for far too long today and am nearing the point of re-writing the script in 1.0, but I’d hate to do that in a full 2.0 script base.