Correct procedure to transfers Sales Delivery to Sales A/R Invoice

Hi,

Is there someone who can white some code to explain the best way to transfers a Sales Delivery to A/R Invoice with the SDK the same way as Copy To (A/R Invoice) from the Delivery window in SAP ?

I've been successful at transfering one by hand saving every properties of the document source to the document destination for a simple document

but now I'm faced with documents that have BP's with Credit Limit exceeded etc..etc and I'm getting (XXXX) Internal Error (-5002) occured

Which XXXX is different from one document to another