Diagnosis
In the System Administration Assistant, a function module is to belinked as an executable action to a node.

System Response
The function modules contains transfer parameters.
In the System Administration Assistant, only function modules withoutparameters can be executed.

Procedure
Only use modules without transfer parameters.
You can also modifiy the particular module if it is not an SAP standardobject and you can eneter the required values per dialog.
You can also create a function module that performs the dialog andtransfers the specified values to the relevant module.