CRMXIF_ORDER_SAVE IDOC not getting generated for BUS_TRANS_MSG BDOC

Hello Experts,

In our project, we have a requirement to send custom fields in the BUS_TRANS_MSG to external system through XIF. The model of BDOC BUS_TRANS_MSG triggering IDOC CRMXIF_ORDER_SAVE_M02 perfectly worked in the development system. We wanted to try the custom field extension in the Sandbox. So as per OSS note 916093, we have extended E101_CRMXIF_CUSTOMER_H segments with custom fields and tried generating the interfaces in BDFG transaction. While generation with IDOC CRMXIF_ORDER_SAVE_M we got an error message "Incompatible change to complex data type

type E101CRMXIF_ISU_PRA1_X". So went about creating a custom IDOC ZZ_CRMXIF_ORDER_SAVE_M02 for message CRMXIF_ORDER_SAVE. Even for this config, the IDOC is not getting generated for the BDOCs. Lastly, configured the IDOC ZZ_CRMXIF_ORDER_SAVE_M02 to a custom function module ZZ_BDFG_IDOC_TEST_FM. The FM got generated and activated, even then the IDOC is not generated for the BDOC.

SMOEAC config in Sandbox looks the same as the Development system. We do not the reason why IDOC is not getting generated and also the reason for error in BDFG while generating the interfaces after adding custom fields to CUSTOMER_H segment.

Any help would be appreciated.

Thanks,

Partha