Symptoms
API method GetOrder_API or GetObjAttrList_API returns:
<methodResponse><fault><value><struct><member><name>faultCode</name><value><i4>-1</i4></value></member><member><name>faultString</name><value><string>QWNjZXNzIERlbmllZC4gCgo=</string></value></member></struct></value></fault></methodResponse>
which is base-64 encoded message "Access Denied."
Cause
The order with id requested does not exist or was archived. For GetObjAttrList_API the quired ObjID may not exist.