Causes the

PowerCenter Integration Service

to skip a row and issue an error message, which you define. The error message displays in the session log. The

PowerCenter Integration Service

does not write these skipped rows to the session reject file.

Use ERROR in Expression transformations to validate data. Generally, you use ERROR within an IIF or DECODE function to set rules for skipping rows.

Use the ERROR function for both input and output port default values. You might use ERROR for input ports to keep null values from passing into a transformation.

Use ERROR for output ports to handle any kind of transformation error, including ERROR function calls within an expression. When you use the ERROR function in an expression and in the output port default value, the

PowerCenter Integration Service

skips the row and logs both the error message from the expression and the error message from the default value. If you want to ensure the

PowerCenter Integration Service

skips rows that produce an error, assign ERROR as the default value.

If you use an output default value other than ERROR, the default value overrides the ERROR function in an expression. For example, you use the ERROR function in an expression, and you assign the default value, ‘1234’, to the output port. Each time the

PowerCenter Integration Service

encounters the ERROR function in the expression, it overrides the error with the value ‘1234’ and passes ‘1234’ to the next transformation. It does not skip the row, and it does not log an error in the session log.