On Tue, Oct 7, 2014 at 8:14 AM, Murray Thomson <murraythomson...@gmail.com>
wrote:

> Thanks for your comments,
>
> Is there an open issue for this problem? Is this a bug or am I doing
> something that I shouldn't?
> I cannot hard-code the string because I need to be able to change the IP
> address of a UDP Sink block.
>
> Thanks,
> Murray
>


It's not really a bug since it's part of the design of the variables.
However, it could be a feature in a future release of GRC. We're working on
overhauling GRC in a number of ways that might help us better support this.
Instead of making this an Issue in our Issue tracker, probably better for
the GRC Roadmap:

http://gnuradio.org/redmine/projects/gnuradio/wiki/GRCroadmap

Thanks,
Tom




> On 6 October 2014 20:02, Chris Kuethe <chris.kue...@gmail.com> wrote:
>
>> 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
>>>
>>>
>>> _______________________________________________
>>> Discuss-gnuradio mailing list
>>> Discuss-gnuradio@gnu.org
>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>
>>>
>>
>>
>> --
>> GDB has a 'break' feature; why doesn't it have 'fix' too?
>>
>
>
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