Unable to get allowable values of Table Lookup

Hi,

I am using LAPI of the Attribute Extensions module v4.2.0 to to look up valid values on Text: ADN Table Key Lookup attributes on existing documents.

Unfortunately, LAPI keeps returning an empty list whilst the web UI shows a collection of valid values (see screenshot).

I am using the following C# code:

LLValue catVersion = new LLValue().setAssocNotSet();LLValue existingNames = new LLValue().setList();LLValue existingValues = new LLValue().setList();LLValue allowableValues = new LLValue().setList();                var attrExt = new LAPI_APIATTREXTENSION(session);var doc = new LAPI_DOCUMENTS(session); var docId = new LLValue().setAssoc();docId.add("ID", 467797);  // ID of document var catId = new LLValue().setAssoc();catId.add("ID", 117324);  // ID of category assigned to documentcatId.add("Type", LAPI_ATTRIBUTES.CATEGORY_TYPE_LIBRARY); Console.WriteLine("Getting catVersion");doc.GetObjectAttributesEx(docId, catId, catVersion);  // Get the category details for the documentConsole.WriteLine("catVersion: " + catVersion);  // Outputs details of category attributes of documentConsole.WriteLine(); Console.WriteLine("Getting allowableValues");attrExt.AttrAllowableValues(catVersion, "License", existingNames, existingValues, 1, allowableValues);Console.WriteLine("allowableValues: " + allowableValues);  // Outputs {}Console.WriteLine("getStatus: " + session.getStatus());  // Outputs 0Console.WriteLine("getStatusMessage: " + session.getStatusMessage());  // Outputs nothingConsole.WriteLine("getErrMsg: " + session.getErrMsg());  // Outputs nothingConsole.WriteLine("getApiError: " + session.getApiError());  // Outputs nothingConsole.WriteLine();

I have been able to use LAPI_APIDOCEXTENSION.AttrSetCascadingValues to set values of attributes successfully, but no matter what I supply AttrAllowableValues, it returns an empty list.