Re: [netcdfgroup] c++ NcFile assignment doesn't work

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• Subject: Re: [netcdfgroup] c++ NcFile assignment doesn't work
• From: Jack Stalnaker <jack.stalnaker@xxxxxxxxx>
• Date: Fri, 24 Apr 2015 14:10:24 -0500

Okay, I've narrowed down the problem even further. The code fails with a
different NcBadId error message if I simply declare an empty NcFile:

NcFile foo;

without the followup assignment. I get the same exception, but thrown from
ncFile.cpp line 15. Curiously, the exception happens later if I immediately
follow it up with the assignment shown in the previous email.


On Fri, Apr 24, 2015 at 1:47 PM, Jack Stalnaker <jack.stalnaker@xxxxxxxxx>
wrote:

> I should add that the code works just fine if the NcFile variable is
> initialized immediately. That is, replace:
>
>     NcFile foo;
>     foo = NcFile("blah.nc", NcFile::replace);
>
> with just
>
>     NcFile foo("blah.nc", NcFile::replace);
>
> and it works perfectly well.
>
>
> On Fri, Apr 24, 2015 at 1:33 PM, Jack Stalnaker <jack.stalnaker@xxxxxxxxx>
> wrote:
>
>> Not too far back I noticed that I could not use an NcFile object as a
>> class member, which I asked about here:
>> http://netcdf-group.1586084.n2.nabble.com/NcFile-as-class-member-td7575625.html#a7575628
>>
>> I never resolved that issue, but I was playing around with it again
>> today. I wrote a very simple bit of test code, and realized the problem is
>> actually much more fundamental than the one I originally asked about.
>> Assignment to an empty NcFile variable does not work anywhere.
>>
>> For example:
>>
>> #include <netcdf>
>>
>> int main(int argc, char *argv[])
>> {
>>     using namespace netCDF;
>>     using namespace netCDF::exceptions;
>>
>>     NcFile foo;
>>     foo = NcFile("blah.nc", NcFile::replace);
>>
>>     double baz = 1.0;
>>     foo.putAtt("bar", ncDouble, size_t(1), &baz);
>>
>>     return 0;
>> }
>>
>> fails at the putAtt line with the same netCDF::exceptions::NcBadId
>> exception I saw in the older question. The exception points to ncGroup.cpp
>> line 791, which is just the definition of putAtt.
>>
>> Anyone have any insight? Thanks.
>>
>
>

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  • [netcdfgroup] c++ NcFile assignment doesn't work
    • From: Jack Stalnaker
  • Re: [netcdfgroup] c++ NcFile assignment doesn't work
    • From: Jack Stalnaker