Table has no index order set (Error 26)
The records in the table have no order.
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.
A FIND or SEEK was attempted against a table with no index ordering.
Use SET ORDER TO to specify an index order.
SET RELATION was issued with a non-numeric expression.
Provide a numeric expression.