The HTML forms must be structured in such a way that it is not possible to make entry errors which are only noticed when the data is replicated in the R/3 System. This can be achieved, for example, through the following measures:

• Selection of only one value in checked fields
• Use of drop-down boxes
• Use of a script language for checks (depending on the browser)

The function module IWWO_GET_USER_DATA determines the link between customer master record and employee master record in the HTML template if the technician is also represented as a customer. During tests or where problems arise, call up this function module individually to check whether the links are correct.

The function module IWWO_ORDER_CONFIRM transfers data to the R/3 System. Where errors occur during processing, the data is initially saved in the cluster table IWWO. This interim saving has the following advantages:

• If processing is terminated (for example, owing to a system crash), processing is continued immediately based on the interim data saved when the function module IWWO_SERVORDER_GET_CONFIRM is called up.
• Errors that occur can be corrected directly by the technician on the hand-held device. However, it is also possible for the data to be corrected by an internal service employee. This is particularly useful if the error was not caused by an external service technician, but resulted from incorrect system administration on the R/3 side.

The example template is structured in such a way that the operation detail screen is called up with the data already entered if you enter a corresponding cluster ID. You can then correct the data on the original entry screen. With a suitable browser, this can usually also be displayed on the desktop of the internal service employee, so that this employee sees the data in the same format as that entered by the technician.

The list of errors is displayed in the Object Navigator with Internet Service IWWE. When you select an incorrect completion confirmation, the order detail screen from Internet Service IWWO appears again.

There are two options for correction:

• Errors can be displayed and corrected in the standard system directly after the data has been transferred to the R/3 System.
• Errors can be displayed in the form of an error overview; error overviews have significant advantages over asynchronous data transfer.