EdmProvider throws 'not implemented'

A not implemented exception is thrown in case of the following function call url:

http://localhost:/HelpValue.svc/getHelpValueNotOlderThan?URI='ValueHelp://ALIAS/Country'&notOlderThan=123456789L.

[EXCEPTION]
org.apache.olingo.odata2.api.exception.ODataNotImplementedException
at org.apache.olingo.odata2.api.edm.provider.EdmProvider.getComplexType(EdmProvider.java:43)
at org.apache.olingo.odata2.core.edm.provider.EdmImplProv.createComplexType(EdmImplProv.java:47)
at org.apache.olingo.odata2.core.edm.EdmImpl.getComplexType(EdmImpl.java:97)
at org.apache.olingo.odata2.core.edm.provider.EdmTypedImplProv.getType(EdmTypedImplProv.java:34)
at org.apache.olingo.odata2.core.uri.UriParserImpl.handleFunctionImport(UriParserImpl.java:444)
at org.apache.olingo.odata2.core.uri.UriParserImpl.handleNormalInitialSegment(UriParserImpl.java:169)
at org.apache.olingo.odata2.core.uri.UriParserImpl.handleResourcePath(UriParserImpl.java:136)
at org.apache.olingo.odata2.core.uri.UriParserImpl.parse(UriParserImpl.java:90)
at org.apache.olingo.odata2.core.ODataRequestHandler.handle(ODataRequestHandler.java:72)
at org.apache.olingo.odata2.core.rest.ODataSubLocator.handle(ODataSubLocator.java:121)
at org.apache.olingo.odata2.core.rest.ODataSubLocator.handlePost(ODataSubLocator.java:63)