Function Only Working Manually

Function Only Working Manually

Good evening everyone.

I have a function that creates a PDF from a Creator form. When I execute it manually it works perfectly. But when I execute it from within a On success workflow it is not working. I'll post my code below. Any ideas? 
  1. //Function
  3. void UploadPDFtoDeals(bigint SodexoSqId, string fileName, bigint dealId)
  4. {
  5. exportPDF = invokeurl
  6. [
  7. url : toPdfLink
  8. type :GET
  9. response-format:FILE
  10. ];
  11. //info exportPDF;
  12. crmResponse = zoho.crm.attachFile("Deals",dealId,exportPDF);
  13. }
Here is the On Success Workflow snippet.
  2. // Attach PDF of Form
  3. if(dealResponse.get("Status") == "success")
  4. {
  5. recordDetailsDeal = dealResponse.get("Details");
  6. dealId = recordDetailsDeal.get("id").toLong();
  7. thisapp.UploadPDFtoDeals(input.ID,dealName + " - " + dealCounter,dealId);
  8. }