assigning queue values from sequence

Hi All,

I have a scenario where i need to send n random bytes and out of n bytes i should able to corrupt few selected bytes.

I have used Queue for selecting error bytes list.

Transaction :

rand bit [7:0] tx_data_byte[`MAX_DATA:0] ; // data byte array

rand int unsigned tx_no_of_bytes_to_send ; // number of data bytes to send

rand byte tx_err_bytes[$] ; //queue contains byte positions to be corrupted

Example :

consider i am sending 5 data bytes and I have to corrupt 2,4,5 bytes (corrupting data bytes is handled in driver)

Sequence :

`uvm_do_with( req, { tx_data_byte[0]=='h00;

tx_data_byte[1]=='h11;

tx_data_byte[2]=='h00;

tx_data_byte[3]=='h99;

tx_data_byte[4]=='h55;

///-----------------

tx_no_of_bytes_to_send ==20;

tx_err_bytes == {4,5,7};

})

I am seeing below error from the cadence simulator.

Can somebody help me out in resolving this error .

Error:

Randomization constraint has error, which will cause the randomize function to return 0 and no new rand values will be set:

This feature is currently not supported for queues, dynamic arrays, strings and associative arrays.

Thank you