KB88499
Published: August 26, 2019
Revision: 1.0

Table read returns wrong number of elements or error


Applies To:

Firmware for GRV-EPIC-PR1

Versions Affected:

1.4.0


Symptoms:

Under the following set of conditions, the wrong number of elements is returned or you get an error:

  • Reading table elements (with the PAC Control REST API) from a PAC Control strategy running on a GRV-EPIC-PR1. (The Node-RED for PAC Control node also uses the PAC Control REST API, so Node-RED flows with table reads of a PAC Control strategy on a GRV-EPIC-PR1 will also encounter this issue.)
  • Specifying a non-zero starting index (startIndex) and non-zero number of elements (numElements).

Workaround:

Rewrite the REST API call to handle the numElements (or Length) parameter as a stop index instead of length: set numElements = startIndex + <number of elements to read>. For example, to read 3 elements starting at startIndex=2 specify: startIndex=2, numElements=2+3=5.

Resolution:

Opto 22 has resolved this issue and will include the fix in an upcoming release.

Questions?

Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com


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