Hi
You must activating business function, FIN_TRM_CORR_FW (see SAP Note 1335689
To ensure an open, flexible correspondence framework, the format is a Customizing entity. Specific program logic is required for the format. BAdIs, which use the format filter to call various implementations depending on the format, are available for this purpose. The BAdI implementations for the formats included in the standard delivery are also delivered as standard .
If you use your own formats, it is essential that you also implement the following BAdIs (see SAP Note 1681249):
BADI_TCORF_FORMAT_MULTI_OPTION
BADI_TCORF_FORMAT_SINGLE
BADI_TCORF_FORMAT_SINGLE_OPT