When mapping columns from fields of an SAP R/3 business object to DB2 tables, some generated column names might be longer than 30 characters. In this case, the generated column name will reflect only the first 30 characters of the SAP field name. If the generated name is not what you want, you can change it using the Properties notebook for the table.
if a value is specified in a destination field on an SAP source page, then set the RFC_INI environment.. For example, Set RFC_INI=c:\rfcapl.ini. After you set this variable, you must reboot the machine.