Hi All,
We faced this error and following is the resolution for same we are using the custom workflow for approve supplier invoices.
There is a requirement for this app to work is to pass the MIRO invoice number and fiscal year to the app and this data is read from the container field of task id.
We have added the workflow task container
INVOICE_ID = "MIRO document number
FISCAL_Year = fiscal Year of the MIRO invoie.
we need to have these fields with exact same name and then enhance the BO object and container of the task.
Lets know if you still face the issue
Thansk
Virandra