Update mode F not supported by the extraction api

I am trying to load 0FS_CTR_NO (loads contract numbers as master data) and 0CML_INIT_BUDAT (initialises an InfoCube).

In BW, I schedule a delta initialisation(0FS_CTR_NO) or initialise delta status (0CML_INIT_BUDAT) and no packets are returned.

In R/3, in RSA3, the error message is: Update mode F not supported by extraction api. However, I cannot change the update mode in the test run from "F" to "C" (delta initialisation) as the field is greyed out in R3.