Error 0x88781214

Value: -2005396972 | 0x88781214 | 2289570324

What does it mean ?

DMUS_E_SCRIPT_UNSUPPORTED_VARTYPE  
A variant was used that had a type that is not supported by DirectMusic.
Value: 4628 | 0x1214 | 0b0001001000010100

Where does it come from ?

FACILITY_DIRECTMUSIC  
Direct Music (part of DirectX) - Audio
Value: 2168 | 0x878 | 0b100001111000

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