added warning and handling of when user does not provide lower and upper for T()
added warning and handling of
when user does not provide lower and upper for T()

nxdao2000/nimble,nimble-dev/nimble,nimble-dev/nimble,NLMichaud/nimble,nimble-dev/nimble,nimble-dev/nimble,nimble-dev/nimble,NLMichaud/nimble,NLMichaud/nimble,nxdao2000/nimble,NLMichaud/nimble,nxdao2000/nimble,nxdao2000/nimble