I suspect you are using Mac OS Catalina or later … where Apple introduced
protection on key folders (mainly from 3rd party apps).
See this article for details:
https://nektony.com/duplicate-finder-free/folders-permission
You can either:
- grant access using Settings / Security & Privacy to allow J (probably
Qt, but I don’t know) to access the Desktop
- work in a separate folder (which is what I do)
I reproduced your error by creating a file using text edit and saving to
Desktop, then also to a new folder (work).
Note: I had to add permission to iTerm (my terminal program) just to “ls” the
files in Desktop as I could not see them until I did that.
Then I used the native <fread> function (your <mread> is just a wrapper to
<fread>) to directly read and compare for an error result:
In J on my system:
fread '/Users/rob/Desktop/test.txt'
_1
fread '/Users/rob/work/test.txt'
col1,col2,cold
10,20,30
110,120,130
The Catalina (&later) security is a pain (it is there for your protection, but
still a pain), so I prefer to work in a non key folder to work on docs like
this.
Please confirm if this resolves your issue Patrick…/Rob
> On 29 Aug 2021, at 6:40 am, J. Patrick Harrington <[email protected]> wrote:
>
> I've installed j903 Beta-o on both my Dell xps running Linux Ubuntu and my
> Mac-mini running OS 11. I have a file which I read with
>
> D=. mread < '/Users/jph/Desktop/HS-20Aug-A2.dat' where mread=:
> (_&".)@('m'&fread)
>
> This works fine under linux, but fails with
>
> domain error: mread
>
> on the Mac. Strangely, running jconsole on the Mac, the read works OK. Any
> idea why the Mac fails under Qt while under Ubuntu it is fine. BTW, jqt on
> the Mac running j902 has no problem - this just appeared in 903.
>
> Patrick
>
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