i have data of 468 by 8 char type, I need to modulate it using qpsk modulator.

srb =

468×8 char array

    '11111110'
    '00000000'
    '00000000'
    '00000001'
    '00000000'
    '00000000'
    '00000000'
    '00000001'
    '00000000'
    '00000000'
    '00000001'
    '00000000'
    '00000000'
 ... 400+ rows here
    '00000000'
    '00000000'
    '00000001'
    '00000000'
    '00000000'
    '11111111'
    '11111111'
    '00000000'

qpskMod = comm.QPSKModulator('BitInput',true);
qpskTx = qpskMod(srb);

and got the following error

"Changing the data type on input 1 is not allowed without first calling the release() method."

kindly guide me

[Stephen23]

@Sajid Sarwar: today I formatted your code for you. In future you can do it yourself: select the code text, click the {} Code button, ensure an empty trailing line.

Also note that posting nearly 500 lines of a numeric vector is likely to discourage people from reading your question.

[Guillaume]

Is this a follow up to your previous question whose current answer is almost certainly not what you're after?