ok so this is likely a case of your gr-UHD assuming an older API for 
recv_async_msg. 

This is just a warning that eventually that older API will go away. 

Probably if you had totally up to date everything, or a UHD library that was of 
an earlier vintage that matched he-UHD, yiu wouldn’t get this message. 

Sent from my iPhone

> On Mar 12, 2021, at 3:20 PM, Jerrid Plymale <[email protected]> 
> wrote:
> 
> 
> Hello Marcus,
>  
> This is coming from a Gnuradio flowgraph that I created myself. It’s got USRP 
> Rx and Tx blocks, a block that takes samples of the signal and preforms some 
> DSP, and a bunch of GUI variable control and variable display blocks.
>  
> Best Regards,
>  
> Jerrid
>  
> From: Marcus D Leech <[email protected]> 
> Sent: Friday, March 12, 2021 12:17 PM
> To: Jerrid Plymale <[email protected]>
> Cc: [email protected]
> Subject: Re: [USRP-users] Where do I find this call to change it.
>  
> I think we need more context. 
>  
> Is this from a program you write yourself?
>  
> Someone else’s code?
>  
> A Gnuradio flow graph? Your own? Someone else’s?
>  
>  
>  
> Sent from my iPhone
> 
> 
> On Mar 12, 2021, at 3:02 PM, Jerrid Plymale <[email protected]> 
> wrote:
> 
> 
> Hello All,
>  
> Here is the warning message I am trying to solve:
>  
> [WARNING] [MULTI_USRP] Calling multi_usrp::recv_async_msg() is deprecated and 
> can lead to unexpected behaviour. Prefer calling tx_stream::recv_async_msg().
>  
> I am trying to solve this warning message when I am running my USRP X310, but 
> I have not had any luck finding the file I need to edit. Can anyone direct me 
> on how to solve this problem?
>  
> Best Regards,
>  
> Jerrid Plymale
>  
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