3336636 - ITAB_ILLEGAL_SORT_ORDER short dump in ‘Manage Workflows for XX’ when adding condition

You create an implementation of method IF_SWF_FLEX_IFS_CONDITION_DEF~GET_CONDITIONS of badi SWF_WORKFLOW_CONDITION_DEF, of add some conditions to flexible workflow for purchase requisition, purchase order or any other kind of document. Then, you get an short dump ITAB_ILLEGAL_SORT_ORDER in Manage workflows app. 

• SAP Fiori
• S/4 Hana

Manage workflows for purchase orders; manage workflows for purchase requisitions; manage workflows for service entry sheets CONDITION type ct_condition , KBA , MM-PUR-PO-WFL , Purchase Order Workflow , MM-FIO-PUR-REL , Fiori UI for Purchasing Approval , MM-PUR-REQ-WFL , Purchase Requisition Workflow , MM-PUR-OA-WFL , Outline Agreement Workflow , MM-PUR-RFQ-WFL , RFQ/Quotation Workflow , Problem