Navigate SMGW and perform the steps as follow:
Click on menu tab Goto->Expert Functions->External Security->Maintenance of ACL Files
Steps to reread RFC Gateway ACL files:
SMGW->goto->Expert Functions->External Security->Maintenance of ACL files. (here you will be able to see RFC Gateway ACL files) ->goto ->reread/reread(global)
If you have done the changes in ACL files you will see the following prompt
You can click ok/cancel to close the popup. Perform the above mentioned steps in popup to reread the ACL files.
You can also check the following help link: