KB84791
Published: December 10, 2015
Revision: 2.0

Heavy use of a file COM handle by multiple charts may cause the controller to reset


Applies To:

SNAP-PAC-S1
SNAP-PAC-S1-FM
SNAP-PAC-S1-W
SNAP-PAC-S2
SNAP-PAC-S2-W
SNAP-PAC-R1
SNAP-PAC-R1-B
SNAP-PAC-R1-FM
SNAP-PAC-R1-W
SNAP-PAC-R2
SNAP-PAC-R2-FM
SNAP-PAC-R2-W
SOFTPAC

Versions Affected:

Problem affects: Firmware - All versions
Problem is fixed in version: PAC Firmware R9.4c

Resolved In Version:

Problem is fixed in version: PAC Firmware R9.4c


Symptoms:

If a COM handle is used by multiple charts and is accessed frequently by those charts, hardware control engines may reset, and SoftPAC may queue a Bus Error (-16).

The reset or bus error will occur if one chart closes a COM handle while another chart is in the middle of using it. The chart that is still using it may not know it is closed and try to use the now-invalid handle. 

Workaround:

Use a flag variable in the strategy to synchronize the COM handle.

Resolution:

Opto 22 has resolved this issue.

Questions?

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


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