You may get this error if you attempt to write to the SharedVariableIO property node too frequently. See the Additional Information section for details on why the error occurs. The best way to prevent this error is to use event-based programming instead of writing to the Shared Variable inside of a loop.
When a property change is made to a Shared Variable in the Shared Variable Engine, the Shared Variable becomes temporarily inactive. If you attempt to write to the shared variable at this time, this error can result.Additional suggestions to prevent errors when writing to a Shared Variable property include:
\\localhost\process name\variable name.Alarms.Hi.level
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