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<== Date ==> <== Thread ==>

Subject: Re: labCA and EPICS_CA_MAX_ARRAY_BYTES
From: Till Straumann <strauman@slac.stanford.edu>
To: John Dobbins <john.dobbins@cornell.edu>
Cc: EPICS Tech-Talk <tech-talk@aps.anl.gov>
Date: Tue, 25 May 2010 10:27:12 -0500
On 05/25/2010 09:55 AM, John Dobbins wrote:
Is it possible to use labCA to retrieve arrays larger than 16K?


Yes - I routinely use that. You have to make sure EPICS_CA_MAX_ARRAY_BYTES is set in the environment *before* you start matlab or scilab (RTM).

On the IOC, too, you need EPICS_CA_MAX_ARRAY_BYTES but
since you tested with caget that's obviously set up correctly.

-- Till
I have EPICS_CA_MAX_ARRAY_BYTES set to a large number and verified that caget will retrieve a large array but labCA 3.1 returns an error.

data= lcaGet('IBLEMS01_data', 120000);
Initializing labCA Release '$Name: labca_3_1 $'...
Author: Till Straumann <strauman@slac.stanford.edu>
??? Error using ==> lcaGet
multi_ezca_get - ezcaGetWithStatus(): get_callback() : The requested data transfer is greater than




John Dobbins

Cornell University
Laboratory for Elementary-Particle Physics


Replies:
Re: labCA and EPICS_CA_MAX_ARRAY_BYTES emmanuel_mayssat
References:
labCA and EPICS_CA_MAX_ARRAY_BYTES John Dobbins

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