Bootloader won't write start address [solved]

[Rick Booth]

Have you enabled any option under the advanced tab in the gui?
Post the hex file and a hex file where you have read the PIC after writing it with ds30 Loader.

Thanks for the quick response. The only option I enabled is "don't write empty pages" but I've tried it with and without this. In the firmware I first tried it with both bootloader and goto protection enabled, then without goto protection. Attached files are for the latter.

Am I right in thinking that the GUI rearranges the hex file? The data sent doesn't look consistent with the file as loaded.