I ran into this just last week, trying to have editable text fields for
configuration information ("hackrf=0", "rtl=0", ...) that would be store in
the config block. I ended up punting on the issue, and just hard-coding
those strings into my flow graph. Glad to know it wasn't something I did
wrong.

On Mon, Oct 6, 2014 at 8:00 AM, Tom Rondeau <t...@trondeau.com> wrote:

> On Mon, Oct 6, 2014 at 4:39 AM, Murray Thomson <murraythomson...@gmail.com
> > wrote:
>
>> Hi,
>>
>> I'm getting this error with string type variables using gnuradio 3.7.5
>> and I cannot figure out how to solve it. I'm using a normal variable plus a
>> config variable in this way:
>>
>> Variable:
>>    id: variable_A
>>    value: config_variable_A
>>
>> Variable Config:
>>    id: config_variable_A
>>    ...
>>    WriteBack: variable_A
>>
>>
>> This way the variable reads the config file at the start and the variable
>> config writes the latest value of the variable at the end. It works very
>> well with Integers.
>>
>> When I change the Config variable type to "String" and I generate the
>> flow graph, I get the error:
>>
>> Generate Error: circular dependency caught in sort_variables
>>
>> Could anyone please help me to get this behaviour for a String type
>> variable please?
>>
>> Thank you,
>> Murray
>>
>
> Yeah, this is a fundamental issue with the way that the GRC templates are
> formatted and described. The circular issue has come up rarely in the past,
> but it's certainly been a problem for me here and there.
>
> Tom
>
>
> _______________________________________________
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> Discuss-gnuradio@gnu.org
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>
>


-- 
GDB has a 'break' feature; why doesn't it have 'fix' too?
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