I'm working with SharePoint 2010 and SharePoint Designer 2010.
I have a List and a document library. In the list, I have a lookup field that points to the document library title. I am creating a workflow on the document library, when the document is uploaded and tagged with a InternalIDNum, I want the workflow to update the lookup field in the list for that InternalIDNum. Since there may be existing document titles already in the lookup, I would like to append the values. So the lookup could already have Document1, Document2 and I would upload Document3 and that would be added.
I formatted according to the following article, Sharepoint 2010: Update Lookup Field Multiple Value with a Workflow, but it doesn't populate the value. I'm trying to figure out what I'm missing as far as if the variables have to be a certain type, or the Update List Item has to be set to a certain type.
Thanks in advance.