Once David Rubin provides a gain calibration file to update BPM gains, use the ln command to create a symbolic link
first use the mv command like this:
mv gain_cal_mapping.in old_gain_cal_mapping.in
then
ln -s /nfs/acc/user/dlr/let/positrons/20141209/cbpmii_gain_template_20141210.dat gain_cal_mapping.in

...

Then in cbic use the APPLY GAIN MAPPING CORRECTIONS(30) to update the gains.
then INSTALL UPDATED PARAMETERS(23) to save the changes to BPM_INST_params.cfg.
Restart the East and West servers, and ask David to verify he sees the change he expected.

-- MatthewStedinger - 10 Dec 2014