Hi @janlemon,
I download your files and found that you made Argument (in_excelFileInfo) mentioned in WF (Get_pdfFilePath2) with Fileinfo Type however when run this WF it gives object refrence error as there is no file info added you need to add location first as string then try to get file info after that - note: Already tried both acitivity and add string location for excel file and output was file info normally appear please try and update us also what the need to add excel file location as fileinfo type not string type ?