which transformation not support error output
The variable that the Row Count transformation uses must already exist, and it must be in the scope of the Data Flow task to which the data flow with the Row Count transformation belongs. The transformation stores the row count value in the variable only after the last row has passed through the transformation. Therefore, the value of the variable is not updated in time to use the updated value in the data flow that contains the Row Count transformation. You can use the updated variable in a separate data flow. This transformation has one input and one output. It does not support an error output.