Running your experiment is quite easy. Select Run from the Experiment menu or click the corresponding play button which is shown in figure 9.
Before you do this you may want to click on Validate experiment in order to check if all operators are nested correctly, provided with their necessary input and mandatory properties are set (figure 10). Although this might be useful, you do not need to do it manually, since these checks are performed automatically before an experiment is started.
Error messages are written to the message viewer. Additionally they are indicated by an exclamation mark next to the operator in the tree view. An example is shown in figure 11. You can display these messages and more information about the operator by pressing [F1] or selecting the Operator info menu item from the context menu or from the Tools menu.
![]() |
You may follow the progress of your experiment by observing the output which is displayed in the Message Viewer. Note, that in GUI mode, the output does not need to be written to a log file. If you did not specify a log file you can always save the message viewer contents to a file by selecting the corresponding menu item in the Message Viewer's context menu. You can also perform a search in the Message Viewer. This option is also accessible from the context menu of the viewer.