Solution : https://service.sap.com/sap/support/notes/1008778 (SAP Service marketplace login required)
Key words :
upgrade current workflow instances, correction instructions attached, workflow management, release 45b, basis release 640, encounter errors, error status, error message, table swp_nodewi, swpsteplog reason
Related Notes :
| 1075730 | Errors when you update the SWP_NODEWI table |
| 1068627 | Composite note about workflow upgrade |