Using rfcconnect to connect to a SAP application or message server.
if you want to connect directly to a SAP application server, the rfcconnect statement would look like the example below:
rfcconnect = [ "ifdatabase=XXX,lang=E,client=100,ashost=system1,sysnr=00,lcheck=0,use_sapgui=0 ]; rfcuser="rfc_userName"; rfcpasswd="rfc_Password";
If you want to conenct to a message server, the string would look like the following example:
rfcconnect=[ "ifdatabase=XXX,mshost=message_server,r3name=sap_SYSTEM_NAME, group=group_name, lang=E, client=000, sysnr=00, lchec=0, use_sapgui=0 ] ; rfcuser="rfc_userName"; rfcpasswd="rfc_Password";