What Does This Error Mean?

[WPJoe]

I received this error when trying to synch a playlist to my android device:

MusicBee v2.1.4924.34601 (Win6.1), 27 May 2014 17:45:

System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
   at System.ThrowHelper.ThrowArgumentOutOfRangeException()
   at #=qe9dYDuw0vfamTOgDdrU4AYk0QlcMZ_0Je9yqhhkP4Dk=.#=qBBSJ37PWqAdBL3pDa0uutYySPRQMFrDTwAGGr6kcb9M=(#=qKgrTK7xGiiM4vbusPi$3yOJFPSSHCsygNhQPagmB760= #=qleC76KkPrmbFU1VwpuJlpA==, Object #=qBUK0GzMERiS7W325E8lRO3fNrVFXRhilcdlWRobrNEY=, #=qZty5E_$5jBsuQv1YkZTd93nDVzHxcVvlMyAdxdbilvQ= #=qEJUWsqNdTsNp14Io7slkcA==, Exception #=qmlzq2cB_pCQ2xIbOEHzkrA==)
   at #=qe9dYDuw0vfamTOgDdrU4AYk0QlcMZ_0Je9yqhhkP4Dk=.#=qFiLDC6z8O3uBCFk7VnmC3VLaR1TMCCUd9L$QqU84iOw=(#=qKgrTK7xGiiM4vbusPi$3yOJFPSSHCsygNhQPagmB760= #=q$QNCaAd44P2bZYwzZk8yJA==, Object #=qqlcG6roosNjjiCvQpPcEYSES98TtnykgSZsBN7FvA$U=, #=qZty5E_$5jBsuQv1YkZTd93nDVzHxcVvlMyAdxdbilvQ= #=qNalcXHnr9uTYfnfzgBKPsA==, #=q1mqN6bfJHVIEZsqkhCqpSHTLJki3HFdJl713MgTHYVnSuti6sGy7C0K5O_3MfM8m #=qNXKBdl2HeS_VC_hpi2EH5g==, Exception #=qGNsu61r2RP3fg1itgJfJAw==)
   at #=qKgrTK7xGiiM4vbusPi$3yOJFPSSHCsygNhQPagmB760=.#=q6su6ERKfsNAFvFyPZQ7dCgCqrbcBm1T1XKyxyeFYspg=(#=q1mqN6bfJHVIEZsqkhCqpSHTLJki3HFdJl713MgTHYVnSuti6sGy7C0K5O_3MfM8m #=qDOZJpvXKeqY2x8rxDW6cNw==, #=qZty5E_$5jBsuQv1YkZTd93nDVzHxcVvlMyAdxdbilvQ= #=qNnj8UBP$c9IbLIa7zMgu2w==, Boolean #=qY9gG1jkH4iiqKXEInQOOdg==, Dictionary`2 #=qr$c9bSPxqVDx4Gxc9OlU9t6k9zo8IYwGUmjtxwrRXK0=, Object #=qpKgBi6B_0xlpbS3dhiZzrqBrEGn4xUu6SbsgowLgMhc=)
   at #=qKgrTK7xGiiM4vbusPi$3yOJFPSSHCsygNhQPagmB760=.#=qhC_rVtqIcy68VEoXQSnLS$gVy5SKkSs99c3HV2qfJ7Q=(#=qfK4mgvZ$heXbhnw3tA_MKoVY$2MwKE5_t_96$vXx1RSuu0g8HmArXOitv8z6$TZX #=qHygRMtw4Uwbf3prEMSJ98w==, Dictionary`2 #=qaUw84Du0iqg_IWpQyqp7Xw==, Object #=qVRMUZYc7d9Kxd9k6U34l_Y9Sp1Qt4AMqmmaHOmbRtks=)
   at #=qKgrTK7xGiiM4vbusPi$3yOJFPSSHCsygNhQPagmB760=.#=qDVe8HT9cvHnUVcm4VJMdvQ==(#=qfK4mgvZ$heXbhnw3tA_MKoVY$2MwKE5_t_96$vXx1RSuu0g8HmArXOitv8z6$TZX #=qSBvItKiIqLTVow_EjHKrdw==, Object #=qgq_ATUmGyg7VsvrTBhN3q$a4SPm$ptrLgXNz8fHONwg=)
   at #=qe9dYDuw0vfamTOgDdrU4AYk0QlcMZ_0Je9yqhhkP4Dk=.#=qtRBhzn5kjr2YprVm48_WVCz7AjZZXw9knTABTJVBbig=(Object #=q9540JFAf6DtGh3StKOjLng==)

[Pingaware]

Not sure, but that's a very old version you're using. Try updating to the latest version (I'd recommend updating to the latest beta than putting the latest patch over the top of that) using this advice here.

[psychoadept]

Install 2.3 from the download page first, then follow Pingaware's instructions.

[WPJoe]

Thank you both very much.
I love this program.