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After a successful execution you can see that three documents are visible in the "Documents" tab of the operation. The first document contains the value from process variables having Index number [0] like invoiceto[0], description[0] etc. The second document contains the value from process variables having Index number [1] like invoiceto[1], description[1] etc. The merged version of these two documents is also available.
You can view the content of the first two documents here. The third document is simply a merged version of the first two.
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