I was just syncing to my tablet and I received this error message saying the process failed when trying to copy my playlists.
The funny thing is that the music copied fine, it's only the .m3u files that refuse to be synced.
I tried changing to .pla format in device settings and that did work, but the app I use doesn't support it.
This is also the first time I've synced this device with MusicBee v3.0, I don't remember having this problem before.
Troubleshooting included restarting the tablet, deleting the files stored on the device manually, and syncing all music from scratch.
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26/10/2015 19:38:33 - Object reference not set to an instance of an object.
26/10/2015 19:38:34 - 6.1.7601.65536 - 3.0.5776.39804 - System.Exception: Add playlist G:\Music\Playlists\Nexus ProgRock.m3u ---> System.NullReferenceException: Object reference not set to an instance of an object.
at #=qRPla1OnABvuaaw9dPtKMcfMAhZvCHmu9_SsXFYGIHhEzzc9dvUmLtMHSORSZVK1r.#=qxQQ0l4pBzdmLMK$B0oIQ_Q==(#=qkD3jaOfVkI7vMlr7qTYDbJQuFE2vT0GaO2FWxNEdLLA= #=quOqUqEh0U6dk9y9wpRwlmQ==, IList`1 #=qTEM8$2gHdDaSBpS49y5$tw==)
at #=qkD3jaOfVkI7vMlr7qTYDbJQuFE2vT0GaO2FWxNEdLLA=.#=qRhNMnf3mQ5dYUfbNUPmNiQ==(List`1 #=qnyn3TjOBUgGVKWo2dFbFcg==)
at #=qJSRfEiXN4usomskUYqgmVL_A1hR_pIe954OkEWVo31E=.#=qTIAPDrpl4Epcf3ruODZ3Tt2S5lUnDLKluumkeW6wcnE=(#=qkD3jaOfVkI7vMlr7qTYDbJQuFE2vT0GaO2FWxNEdLLA= #=qSvm7iF0m4zHPtW_HCqrxhQ==, Dictionary`2 #=q$nHP$rvnV$ODkm0Qnj6RTQ==, Object #=qs4s21h1oYuFQuknR3dMz00pkmS5ntJ4_FnkPfxRpehY=)
at #=qJSRfEiXN4usomskUYqgmVL_A1hR_pIe954OkEWVo31E=.#=qRrTZLDt5T5YoRI2q$2Xfcg==(Boolean #=qIDl8m12hjxg1ZdLdePaqCg==, Boolean #=qyTDazYZsFET2_HTweeFu0w==, Dictionary`2 #=qZQbJcSqWYOk1gEIdh_lyX4HHZA2$weYMd6Jbr9hZewk=, List`1 #=qgeZEaClewRlYkLiECctVt8XEKKi$255_Gz0VMWttueQ=, Object #=qmiKwKVRlVIAOO_EyWtBta2hjmszLun$1uGMcJwyLhwk=)
--- End of inner exception stack trace ---