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FRM-41027: Primary key must be defined for this block.

Cause:  There are no primary key items in the block and one of the following has happ

1. You attempted to set Key_Mode of primary key option on for the block.

2. The Key_Mode is set to Automatic and the datasource to which your are connected does not support UNIQUE key mode.

Action:  Specify one or more primary key items on the block.

Level:  >25

Type:  Error