Array syntax not supported

[pedja089]

You can't use .BYTEX or HIGhBYTE, LOWBYTE etc with array.
Workaround that

for counterd = 0 to 15
    pcaChannel = counterD                                              
    i2cControl = $6 + 4*pcaChannel  
    Tmp= fadeset[counterD]                         
    I2CWRITE SDApin,SCLpin,i2cWriteAddress,i2cControl,[0,0,Tmp.lowbyte,Tmp.highbyte]
Next counterD

OR

for counterd = 0 to 15
    pcaChannel = counterD                                              
    i2cControl = $6 + 4*pcaChannel                         
    I2CWRITE SDApin,SCLpin,i2cWriteAddress,i2cControl,[0,0, fadeset[counterD]]
Next counterD

If you array is word wide, PBP should send 2 byte in sequence. But I'm not sure.