Analogue-sequencer

> I did connect up my FATcontroller sequencer to the input of the P3 
> and the P3 would start and stop correctly.

OK, so the input isn't hurting the data...

Can you confirm you did a complete memory wipe at first power on ?
I haven't checked exhaustively, but a bulk dump of data could be screwed
up by inconsistent data that results from not having done a wipe at some
point.

I'm probably insulting your intelligence, but you are trying to upload
the firmware dump using the firmware update mode, rather than doing a
sysex 'recv' from the play mode ?
There are two different error messages - SysEx load in the firmware
updater gives a "BAD DATA !" error for a block that doesn't have the
correct structure, or a "BLK CHK Error !" error if the checksum is
wrong.

In bulk dump/receive, the errors are "Bad Block !" for the wrong
structure, or "ERROR !" for a bad checksum.

Cheers,
Colin f