Error when saving to flash

@Gordon Im not sure what the difference is but once a save from the command line stops working the only way I can get it back it be blanking out the code window and setting save on load and saving. Once that save is done, running save() on the command line works !

Connected
>
>dump()
pinMode(D29, "input_pulldown", true);
=undefined
>save()
Disconnected
Connected
>
>dump()
pinMode(D29, "input_pulldown", true);
=undefined
>
 _____                 _
|   __|___ ___ ___ _ _|_|___ ___
|   __|_ -| . |  _| | | |   | . |
|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v91 Copyright 2016 G.Williams
>Erasing Flash.....
Writing...
Compressed 32000 bytes to 8
Checking...
Done!
Loading 8 bytes from flash...
=undefined
>dump()
pinMode(D29, "input_pulldown", true);
=undefined
>save()
=undefined
Erasing Flash.....
Writing....
Compressed 32000 bytes to 1174
Checking...
Done!
>dump()
pinMode(D29, "input_pulldown", true);
=undefined
>
 _____                 _
|   __|___ ___ ___ _ _|_|___ ___
|   __|_ -| . |  _| | | |   | . |
|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v91 Copyright 2016 G.Williams
>Erasing Flash.....
Writing...
Compressed 32000 bytes to 8
Checking...
Done!
Loading 8 bytes from flash...
=undefined
>load()
=undefined
Loading 8 bytes from flash...
>dump()
pinMode(D29, "input_pulldown", true);
=undefined
> 

1
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SENT