I've been hitting my head against a wall for a few weeks trying to figure this out.

I have two lists: The first has a list of books with a column of the quantity of the books available (InfoStationContentList). The second list (TestCheckOut) is a supposed to work as a "checkout" list, and has the option to look-up the Book Title from InfoStationContentList, and submit an item to have the book delivered. I have 2 look-up fields in TestCheckOut list; One of the Content Title (the book) and the second with the Quantity available. I have attempted (unsuccessfully) to create a workflow where If the Quantity in TestCheckOut (look-up field) is zero, the workflow (or checkout is rejected). HOWEVER, If the Quantity is not zero, it will subtract one from the InfoStationContentList quantity, thus updating its availability. Here's what I have so far: enter image description here

I understand I will have to perform a look-up on the Title to do the calculation, but it still will not subtract 1 from the Quantity in InfoStationContentList when the workflow is completed. I've searched the other questions on the form, and tried to set up my look-up similarly, but have not had luck. Any insight? I appreciate the help! FYI: I'm using SharePoint 2010 and SharePoint Designer 2010.

1 Answer 1


After you output the subtracted value to Variable:calc1, you have to do an Update list item action on item in InfoStationContentList where titles match and set the value of Quan to Variable:calc1.

  • Thanks so much for your help Erin! Unfortunately, it returned an error. I'm relatively new to Workflows... any idea what might have caused the error?
    – Brian
    Aug 1, 2016 at 19:32
  • Nevermind! I Think I figured it out! THANK YOU SO MUCH!!!!!
    – Brian
    Aug 1, 2016 at 19:36

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