Take a look at the “Dataset” section of the “Working with different Datatypes” section of the manual:
The error is because you are trying to iterate through a dataset and a dataset is not iterable.
There are some steps you can take to iterate through the rows and columns however. I copied the code below directly from the manual.
[code]
Pull the dataset property off a Table component
data = event.source.getComponent(“Table”).data
for row in range(data.rowCount):
for col in range(data.columnCount):
print data.getValueAt(row, col)[/code]