[Discuss-gnuradio] USRP2 runtime errors

[Zohair M. Abu Shaban]

Dear All,
 
I have implemented my own blocks that reads from an array of 4 synchronised and 
samples-aligned USRP2's. At the run time, sometimes I receive this error: 
 
thread[thread-per-block[4]: <gr_block from_samples_to_plot_vc (1)>]: Invalid 
input
 
I use MATLAB libraries in my blocks in order to process the data and then plot 
the result using the MATLAB function plot()
 
Sometime also i also receive this error:
usrp2: mismatched command reply length (expected: 0 got: 215). op = <unknown 
opcode: 20>
 
For both errors, I just re-run the graph again and it works well.
 
Any hint about those to errors, please?
 
Cheers,
 
Zohair                                    
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