Data Object Fields on MI Client 7.1: Null value instead of empty value

Hi,
We are migrating an application from Mobile 7.0 to 7.1 and we don´t know if our Data Objects are missing some configuration, but when a field is sent to MI Client with empty (blank) value, we get this field in the application with a null value instead of an empty value.
This same application works fine in Mobile 7.0 and when a field with empty value is sent to MI Client, a empty value is get by the application.
Has anyone any idea?
Thanks.

Hi,
SAP has solved the issue. They told us to add the following parameter in defaults.properties:
com.sap.tc.mobile.bc.string.trim=false
Thanks.

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