I loaded a sequenced song, Tea for Two, which I had not played for a long time,
and [Error 81, An error as occurred while the SD was loading. Please try again],
appeared and as requested I tried again, and Error 81 came up again.
While staring at the message, trying to fathom out what could be wrong,
the message disappeared and the sequenced song was loaded. I have loaded the song several times, and each time it comes up Error 81, and each time I wait for a short time,
the message clears, and the sequenced song is loaded.
Perhaps your style may be loaded.
Just a thought.
I use SanDisk 256mb.
Best wishes,
Fred Wren.

One Moral of the story - KEEP REGULAR BACK-UPS of all your SD Cards on your PC and even transfer them to removable media such as CD, or Memory Stick, in case of a PC Crash.
Like many other players, I have literally Thousands of hours of irreplaceable work on SD Cards. I would hate to think that due to one small 'slip' or 'glitch' that I would lose the lot or even some of them!

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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley