KB89147
Published: November 4, 2020
Revision: 2.0

Subroutine Variable with Same Name and Type as Global Variable May Cause Control Engine Reset


Applies To:

Firmware for:

  • GRV-EPIC-PR1
  • SNAP-PAC-S1, SNAP-PAC-S1-FM, SNAP-PAC-S1-W
  • SNAP-PAC-S2, SNAP-PAC-S2-W
  • SNAP-PAC-R1, SNAP-PAC-R1-FM, SNAP-PAC-R1-W, SNAP-PAC-R1-B
  • SNAP-PAC-R2, SNAP-PAC-R2-FM, SNAP-PAC-R2-W
  • SoftPAC

Versions Affected:

GRV-EPIC-PR1: 1.5.0 to 2.0.2
PAC Controllers: R10.0h to current

Resolved In Version:

For GRV-EPIC-PR1: 3.0.0


Symptoms:

In PAC Control Debug mode, you may observe a controller timeout error message (indicating a possible PAC Control engine reset) when stepping through a subroutine in a strategy under the following two conditions:

  • A subroutine in the strategy contains a local variable with the same name and type as a global variable in the calling strategy.
  • While stepping out of that subroutine, you are inspecting that local variable of the same name.

Workaround:

Do not inspect a subroutine local variable when stepping out of the subroutine if the variable has the same name and type as a global variable in the calling strategy.

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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