- deactivated "-onerror", since its semantics are expressible via try/catch, and there are no regression tests for xotcl and nx, and we could not find any script that uses this
- use in forwarders "-frame object" instead of "-objframe" in nx for consistency with other calls (e.g. dispatch). Other values for "-frame" are not allowed. (btw, XOTcl has "-objscope")