Table has no index order set (Error 26)
The records in the table have no order.
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An index for the table file was not selected when an UPDATE command using the RANDOM clause was encountered.
Select an index for the table file.
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A FIND or SEEK was attempted against a table with no index ordering.
Use SET ORDER TO to specify an index order.
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SET RELATION was issued with a non-numeric expression.
Provide a numeric expression.