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developmentLine NOT available via REST API in 4.0.3

All,
We are getting an error "The error is because "developmentLine" is an invalid field" when running a REST call against our 4.0.3 environment. The same call (basically) against the Jazz.net environment (4.0.6 ?) is successful. Does anyone know when this was made available? The documentation that states developmentLine should be there:
We are getting an error "The error is because "developmentLine" is an invalid field" when running a REST call against our 4.0.3 environment. The same call (basically) against the Jazz.net environment (4.0.6 ?) is successful. Does anyone know when this was made available? The documentation that states developmentLine should be there:
https://jazz.net/wiki/bin/view/Main/ReportsRESTAPI#Field_selection_and_filtering