diff --git a/crpptbx/TCV/gdat_tcv.m b/crpptbx/TCV/gdat_tcv.m
index 8998ecd94f21a7467f937695ed1e541724054aa6..f8dd46b7000b8d7118079cf3fde4ec77b27bd052 100644
--- a/crpptbx/TCV/gdat_tcv.m
+++ b/crpptbx/TCV/gdat_tcv.m
@@ -795,6 +795,7 @@ elseif strcmp(mapping_for_tcv.method,'switchcase')
       n1=tdi('abs(mhdmode("LFS",1,1))');
       n2=tdi('abs(mhdmode("LFS",2,1))');
       n3=tdi('abs(mhdmode("LFS",3,1))');
+      gdat_data.data_fullpath='abs(mhdmode("LFS",n,1));% for 1, 2, 3';
     else
       aaLFSz23_sect3=tdi('\atlas::DT196_MHD_001:channel_067');
       aaHFSz23_sect3=tdi('\atlas::DT196_MHD_002:channel_018');
@@ -803,6 +804,7 @@ elseif strcmp(mapping_for_tcv.method,'switchcase')
       n2 = aaLFSz23_sect3;
       n2.data = aaLFSz23_sect3.data + aaHFSz23_sect3.data;
       n3=n1;
+      gdat_data.data_fullpath='\atlas::DT196_MHD_001:channel_067 -+ \atlas::DT196_MHD_002:channel_018 for n=1,2, sector3, z=23cm';
     end
     if ~isempty(n1.data)
       gdat_data.data(:,1) = reshape(n1.data,length(n1.data),1);
@@ -814,7 +816,6 @@ elseif strcmp(mapping_for_tcv.method,'switchcase')
       gdat_data.dimunits{1} = n1.dimunits{1};
       gdat_data.dimunits{2} = 'n number';
       gdat_data.units = 'T/s';
-      gdat_data.data_fullpath='abs(mhdmode("LFS",n,1))';
       gdat_data.request_description = 'delta_Bdot from magnetic probes to get n=1, 2 and 3';
       gdat_data.label = {'n=1','n=2','n=3'}; % can be used in legend(gdat_data.label)
     end