KB91609
Published: October 12, 2026
Revision: 2.0

The “Set I/O Unit Scratch Pad Integer 64 Element” command in an action block may cause error -95 in PAC Control


Applies To:

PAC Control Basic
PAC Control Professional

Versions Affected:

All versions prior to R10.6d

Resolved In Version:

R10.6d


Symptoms:

When running a strategy that has the “Set I/O Unit Scratch Pad Integer 64 Element” command in an action block, you may see error -95 (“Data stack is not empty”) in the PAC Control message queue.

Workaround:

To use the “Set I/O Unit Scratch Pad Integer 64 Element” command, remove it from the action block and add it to an OptoScript block.

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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