For my IC-735, for frequency readback to work properly without parsing errors I had to change ReadFreqVfoA_Result_Freq_Start_Pos=7 to ReadFreqVfoA_Result_Freq_Start_Pos=11 Now it works correctly. Figure 15 on page 16-9 of the IC-735 Service Manual ID5428 pdf shows the "Displayed Frequency Field" starting in nibble 11, so this makes sense. In the VarAC_cat_commands.ini file Change Tracking section I see that the start position was changed from 11 to 7 at V6.1, and I noticed a previous discussion in the forum about it. Position value 11 is working for me, and matches the ICOM documentation, that's all I know. I bought this IC-735 new in 1991 and the firmware has never been updated. Thanks much for your fine software, 73, Craig N7RWB