Error Message When Connecting / Disconnecting USB to iPod Classic 6G

[SovonHalder]

I am using Rockbox Version: 8566cd7-131224

Few minutes ago I plugged in my iPod Classic 6G 160GB into my PC..I received an weird message in a white background which said the usb is aborted or something. My iPod was frozen & I had to hold menu+pause button to restart my iPod.

After restarting I connected my iPod to PC but didn't receive any errors. Then after transferring a few songs when I disconnected the USB properly, I received an error saying something like ..

*panic*
 playlist_rsume() : 00M

I didn't write down the whole copy of the error that time..but again I plugged in my iPod to check if the ipod faces similar issues. It didn't get an error while plugging in this time like it did before. But when I disconnected the iPod, I kinda got the same error & this time I noted down the whole error which is exactly this..

  *panic*
   playlist_rsume() : 00M
 pc : 08010938 sp : 000096FC
   A : 0803DCF4
   A : 0800B3EC
   A : 0800B5B8
   A : 0800557C
 bt end


Please Help. I need to know what caused the error & if I need to change the rockbox version or do something else to prevent/repair this issue.