How can I edit the name for Export Attachments?

Nils_AageHafsal1

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I am using Arcgis Desktop 10.4.1 and Arcgis Collector. I've followed the guide for exporting attachments as described on ESRI's webpage here: http://support.esri.com/technical-article/000011912 It works really well, but I want to change the filenames. I want each filename to have the name from a field from the shapefile, and then a suffix (like _1,_2,_3) I did fiddle a bit with this line, trying to add field names and whatnot, but I didnt get it to work. <SPAN class=""> filename </SPAN><SPAN class="">=</SPAN><SPAN class=""> filenum </SPAN><SPAN class="">+</SPAN><SPAN class=""> str</SPAN><SPAN class="">(</SPAN><SPAN class="">item</SPAN><SPAN class="">[</SPAN><SPAN class="">1</SPAN><SPAN class="">])</SPAN> Anyone able to point me in the right direction?