Opto 22

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KB80147
OptoDisplay, ioDisplay, and PAC Display may have problems on PCs with dual‑core processors
Revision:  1.0
Published:  7/14/2008
Applies To
PAC Display Professional
PAC Display Basic
ioDisplay Professional
ioDisplay Basic
FactoryFloor Software - OptoDisplay
Versions
Problem was introduced in version:  
R8.0a PAC Display
R1.0a ioDisplay
R1.0a OptoDisplay
Problem is fixed in version:  
R8.2a for PAC Display

SYMPTOMS

Runtime may randomly crash if it is run on a dual-core processor computer, or a single-core processor computer that permits hyper-threading.

CAUSE

OptoDisplay and ioDisplay were developed prior to the development of dual-core computers and are not designed to work on them. PAC Display R8.0a through R8.1a may also randomly crash. Do not run the affected Runtime versions on dual-core processor or hyper-threading computers. Disable hyper-threading if your computer supports it.

To determine if you have a computer with a dual-core processor, run the CPU-Z utility from http://www.cpuid.com/. Download it from here.

WORKAROUND

Run OptoDisplay or ioDisplay on a single-core computer. Upgrade PAC Display to R8.2a if you are running your application on a computer with a dual-core processor, or on a computer that supports hyper-threading.

RESOLUTION

Opto 22 has included multi-threaded support for PAC Display. Beginning with version R8.2a, PAC Display is supported on dual-core computers, or computers that permit hyper-threading.

Relevant Downloads
No relevant downloads have been specified.
Questions? Contact Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com

DISCLAIMER

This Opto 22 Knowledge Base ('OptoKB') article is intended to provide general technical information on a particular subject or subjects and is not an exhaustive treatment of such subjects. Accordingly, the information in this OptoKB article is not intended to constitute application, design, software, or other professional engineering advice or services. Opto 22 may modify the OptoKB articles at any time. Before making any decision or taking any action which might affect your equipment, you should consult a qualified professional.

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