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From: William Unruh <unruh@invalid.ca>
Newsgroups: comp.soft-sys.math.maple
Subject: Re: simplify
Date: Tue, 15 Aug 2017 14:42:54 -0000 (UTC)
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On 2017-08-15, G. A. Edgar <edgar@math.ohio-state.edu.invalid> wrote:
> In article <omk215$7rm$1@dont-email.me>, William Unruh
><unruh@invalid.ca> wrote:
>
>> On 2017-08-11, G. A. Edgar <edgar@math.ohio-state.edu.invalid> wrote:
>> >
>> > Why not give us an example where you get this message?
>> >
>>    >simplify(sqrt((1-2*m(u)/R(u))*R(u)^4));
>>     Error, (in simplify) invalid input: `simplify/sqrt/product` uses a 2nd
>>       argument, n, which is missing
>> 
>> In the sequence of calculations I an doing, stuff like this can occor
>> all the time.
>> 
>
> In Maple 2015 I get...
>
>> simplify(sqrt((1-2*m(u)/R(u))*R(u)^4));
>
> (-(-R(u)+2*m(u))*R(u)^3)^(1/2)
>

So, it looks like it is bug introduced into 2016.2 (maybe earlier).

>> version();
>
>  User Interface: 1097895
>          Kernel: 1097895
>         Library: 1097895
>                             1097895
>
> Let's see what happens in other versions.

I get
version();
 User Interface: 1194701
 Kernel: 1194701
 Library: 1194701

>