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In the standard Project System, the system does not check the user-defined fields in WBS elements and activities because their significance is customer-specific.
You can use this enhancement to add a check. The components of the enhancement are each accessed when you make entries in the appropriate user-defined field.
In each case, the values of the relevant object (e.g.WBS element or activity) are transferred to the function modules. There are no return parameters. If the value in a user-defined field (field name USR...) is not allowed, an appropriate error message (E...) should be output.
Enhancement CNEX0001 contains the following components:
For details of how to incorporate enhancements, refer to the system documentation or to the online documentation for transaction CMOD (project management of SAP enhancements, function exits)