Re: pvaClientCPP Release 4.5.0 access to a single sub field that has the correct type

[Marty Kraimer via Tech-talk <tech-talk@aps.anl.gov>]

You are correct that the code for puts only works on a top level field 
named  value.
A new issue has been created.
> https://github.com/epics-base/pvaClientCPP/issues/63
Marty

On 11/28/19 11:12 AM, Heinz Junkes via Tech-talk wrote:
> According the documentation to Release 4.5.0 :
>
> Changes have been made for getDouble, putDouble, getDoubleArray, putDoubleArray, getString, putString, getStringArray, and putStringArray.
>
> 1) Previously each only had support for a top level field named value. Each now allows access to a single sub field that has the correct type. Thus pvRequest must select a single field. For example
>
>      pva->channel("PVRdumbPowerSupply")->putDouble(1.0,"power.value" );
>
>
> I try to access a double array  but with no success:
>
>      string channelName("CRYVISIL:STM:FASTSCAN:IMAGE_CHUNK");
>      string providerName("pva");
>      PvaClientPtr pva = PvaClient::get(providerName);
>
>         pva->channel(channelName, providerName, 1.0)->putDoubleArray(freeze(valx), "value.column0");
>
> error message:
> 2019/11/28 10:06:17.754 sis0: void Sis3316Port::updateTask(): PvaClientData::putDoubleArray() did not find a scalarArray field
>
> Command line works:
>
> [junkes@h epics]$ pvget -r "value.column0" CRYVISIL:STM:FASTSCAN:IMAGE_CHUNK
> CRYVISIL:STM:FASTSCAN:IMAGE_CHUNK structure
>      structure value
>          double[] column0 []
>
> How can I address the DoubleArray?
>
> Danke Heinz