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getting an error code which i cant resolve

I am having trouble with a VI program that controls a stepper motor.  The pressure transducer also in the program can stop the motor if pressure goes high.  when i press run an error occurs.  I have checked all lines and tasks and they seem ok.

Does any one have a suggestion?  This is the error i am getting

Error -200463 occurred at DAQmx Write (Digital 1D Bool 1Chan 1Samp).vi:1

Possible reason(s):

Specified read or write operation failed, because the number of lines in the data for a channel does not match number of lines in the data for a channel does not match the number of lines in the channel.

If you are using the Digital Waveform datatype, make sure the number of lines in the digital waveform matches the number of lines in the channel. If you are using boolean data, make sure the array dimension for lines in the data matches the number of lines in the channel.

Number of Lines in Channel: 8
Number of Lines in Data: 3

Task Name: _unnamedTask<1>

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