Unable to 'Cook for Windows' due to Timeline Float Track causing errors

All timelines in a pawn blueprint ‘Box_PlayerPawn’ are causing the cook to fail.
Timelines are being used in a range of other blueprints in the same manner and are causing no errors.

If the Float Track is removed from all the timelines the cook is successful.

New timelines have been added along with the current timelines being deleted. Different naming conventions have been used but the same errors are occurring.

Log error example:

MainFrameActions: Cooking (Windows): UE4Editor-Cmd: [2015.10.15-09.53.34:875][  0]LogBlueprint:Warning: [compiler Box_PlayerPawn] Warning CreatePinForVariable: 'Dazed_Alpha_82E2F0CF4B933337EBAE3DAAF912AB59' variable not found. Base class was probably changed.
    MainFrameActions: Cooking (Windows): UE4Editor-Cmd: [2015.10.15-09.53.34:876][  0]LogBlueprint:Error: [compiler Box_PlayerPawn] Error ExpandForPin error, no property found for  Alpha

MainFrameActions: Cooking (Windows): UE4Editor-Cmd: [2015.10.15-09.53.34:909][  0]LogBlueprint:Warning: [compiler Box_PlayerPawn] Warning Could not find a variable named "Dazed_Alpha_82E2F0CF4B933337EBAE3DAAF912AB59" in 'Box_PlayerPawn_C'.
MainFrameActions: Cooking (Windows): UE4Editor-Cmd: Make sure 'Box_PlayerPawn_C' has been compiled for  Dazed 

“Alpha” is the name of the Float Track within the timeline “Dazed”.

Everything works as it should playing within editor, no errors or warning.

Thanks for any and all help.