If there is a need to resend a Delta job, the job must previously have been initialized (UPDMODE C) by using the IDoc transfer method as the tRFC transfer method does not keep track of the data in SAP.
(The disadvantage of IDoc is that jobs cannot execute in parallel within the same logical system and the row width is limited to 1000 characters.)
Enter the INITRNR (job name that begins with REQU_ ...)
Example from log file:
2016-09-22 10:50:11 Information from server: INFOMSG : Started job: REQU_QTQVCEXTRx_xxxxxxxxxxxxxx
Note that for the targeted extractor: if the tRFC transfer method is activated, it first needs to be deactivated and then the IDoc transfer method can be activated.