I'm seeing the same type of errors. This may be related to what you're seeing: Problem: ArcGIS clients encounter errors related to table schema changes, app domain unloading, or fetch buffers when wo… I also found this workaround talking about setting the SLQ Server max server memory = 70% - 80%. Error: Warning 999999: Table schema changed after cursor declared I haven't had time to try either of these yet. I just found this info today.
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