Finally I found a way to get this working with some manual actions. 1. First of all change the "text file encoding" in the property settings of the ivy project to UTF-8 1. Change manually the Umlaut characters in the wsdl. i.e. Save the wsdl into a file and search/replace the Umlauts. 1. Using the modified wsdl, it should be possible to generate the web service configuration. As a result you will find a `wsClient_nnnnnn.jar` and `wsClient_nnnnnn.wsdl` file in the `lib_ws/client` folder in the project. 1. Generate the web service configuration a second time using the original wsdl. The compile error will still occur, but in the user home directory (e.g. `C:\Users\XYZ\AppData\Local\Temp`) you will found a folder "tempnnnnnn"`tempnnnnnn` with the generated java code that includes the Umlaut characters. 1. Copy/paste the content of the "tempnnnnnn" `tempnnnnnn` folder into the `/src_ws` folder of your ivy project and delete the `wsClient_nnnnnn.jar` in the `lib_ws/client` folder. And as last step remove the `wsClient_nnnnnn.jar` from the Java Build Path of the project.

Finally I found a way to get this working with some manual actions. 1. First of all change the "text file encoding" in the property settings of the ivy project to UTF-8 1. Change manually the Umlaut characters in the wsdl. i.e. Save the wsdl into a file and search/replace the Umlauts. 1. Using the modified wsdl, it should be possible to generate the web service configuration. As a result you will find a `wsClient_nnnnnn.jar` and `wsClient_nnnnnn.wsdl` file in the `lib_ws/client` folder in the project. 1. Generate the web service configuration a second time using the original wsdl. The compile error will still occur, but in the user home directory (e.g. `C:\Users\XYZ\AppData\Local\Temp`) you will found a folder "tempnnnnnn" with the generated java code that includes the Umlaut characters. 1. Copy/paste the content of the "tempnnnnnn" folder into the `/src_ws` folder of your ivy project and delete the `wsClient_nnnnnn.jar` in the `lib_ws/client` folder. And as last step remove the `wsClient_nnnnnn.jar` from the Java Build Path of the project.

Finally I found a way to get this working with some manual actions. 1. First of all change the "text file encoding" in the property settings of the ivy project to UTF-8 1. Change manually the Umlaut characters in the wsdl. Save the wsdl into a file and search/replace the Umlauts. 1. Using the modified wsdl, it should be possible to generate the web service configuration. As a result you will find a `wsClient_nnnnnn.jar` and `wsClient_nnnnnn.wsdl` file in the `lib_ws/client` folder in the project. 1. Generate the web service configuration a second time using the original wsdl. The compile error will still occur, but in the user home directory (e.g. `C:\Users\XYZ\AppData\Local\Temp`) you will found a folder "tempnnnnnn" with the generated java code that includes the Umlaut characters. 1. Copy/paste the content of the "tempnnnnnn" folder into the `/src_ws` folder of your ivy project and delete the `wsClient_nnnnnn.jar` in the `lib_ws/client` folder. And as last step you remove the `wsClient_nnnnnn.jar` also from the Java Build Path of the project.

Finally I found a way to get this working with some manual actions. 1.) 1. First of all change the "text file encoding" in the property property settings of the ivy project to UTF-8 2.) 1. Change manually the Umlaut characters in the wsdl. Save the the wsdl into a file and search/replace search/replace the Umlauts. 3.) 1. Using the modified wsdl, it should be possible to generate the the web service configuration. As a a result you will find a "wsClient_nnnnnn.jar" and "wsClient_nnnnnn.wsdl" a `wsClient_nnnnnn.jar` and `wsClient_nnnnnn.wsdl` file in the "lib_ws/client" folder in the the `lib_ws/client` folder in the project. 4.) 1. Generate the web service configuration a second time using using the original wsdl. The compile error error will still occur, but in the user user home directory (e.g. C:\Users\XYZ\AppData\Local\Temp") (e.g. `C:\Users\XYZ\AppData\Local\Temp`) you will found a folder "tempnnnnnn" "tempnnnnnn" with the generated java code that that includes the Umlaut characters. 5.) 1. Copy/paste the content of the folder into the "/src_ws" folder of `/src_ws` folder of your ivy project and delete the "wsClient_nnnnnn.jar" in the "lib_ws/client" the `wsClient_nnnnnn.jar` in the `lib_ws/client` folder. And as last last step you remove the "wsClient_nnnnnn.jar" the `wsClient_nnnnnn.jar` also from the the Java Build Path of the project. project.

Finally I found a way to get this working with some manual actions. 1.) First of all change the "text file encoding" in the property settings of the ivy project to UTF-8 2.) Change manually the Umlaut characters in the wsdl. Save the wsdl into a file and search/replace the Umlauts. 3.) Using the modified wsdl, it should be possible to generate the web service configuration. As a result you will find a "wsClient_nnnnnn.jar" and "wsClient_nnnnnn.wsdl" file in the "lib_ws/client" folder in the project. 4.) Generate the web service configuration a second time using the original wsdl. The compile error will still occur, but in the user home directory (e.g. C:\Users\XYZ\AppData\Local\Temp") you will found a folder "tempnnnnnn" with the generated java code that includes the Umlaut characters. 5.) Copy/paste the content of the folder into the "/src_ws" folder of your ivy project and delete the "wsClient_nnnnnn.jar" in the "lib_ws/client" folder. And as last step you remove the "wsClient_nnnnnn.jar" also from the Java Build Path of the project.