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Re: Comment about SetDirectory[]

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• Subject: [mg130866] Re: Comment about SetDirectory[]
• From: John Fultz <jfultz at wolfram.com>
• Date: Wed, 22 May 2013 02:19:10 -0400 (EDT)
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• References: <kn77kd$8ig$1@smc.vnet.net> <20130521040232.CCB9869F2@smc.vnet.net>

I've never heard of or seen Alexey's issue before.  However, it is the 
case that NotebookDirectory[] will return $Failed if you execute 
NotebookDirectory[]:

* in a notebook which hasn't been saved to disk, and therefore doesn't 
have a notebook.
* in an evaluation which wasn't directly triggered by a specific 
notebook, such as a ScheduledTask.

John Fultz
jfultz at wolfram.com
User Interface Group
Wolfram Research, Inc.



On May 20, 2013, at 11:02 PM, "Alexey Popkov" <lehin.p at gmail.com> wrote:

> Hi Paul,
>
> I would not recommend to use  the
>
> Export[NotebookDirectory[] <>  "TestResultTime.txt", mTimeDiff, "Table"]
>
> form if you are exporting many such files because NotebookDirectory[]
> sometimes (approximately one time in 500 exports in one of my programs)
> returns nothing and the file is exported to the default directory.
>
> As to your case I think it is possible that SetDirectory[] worked but
> NotebookDirectory[] failed... I would recommend to check the output of
> NotebookDirectory[] with StringLength.
>
> with best wishes,
> Alexey
>
>
>
> "McHale, Paul"  wrote:kn77kd$8ig$1 at smc.vnet.net...
>
> I have often wondered whether to use:
>
> SetDirectory[NotebookDirectory[]]
> Export["TestResultTime.txt", mTimeDiff, "Table"]
>
> or
>
> Export[NotebookDirectory[] <>  "TestResultTime.txt", mTimeDiff, "Table"]
>
> I have left Mathematica open for 2 days as it was running a very long test.
> Maybe something became corrupted.  The first method did not work.  It
> appears SetDirectory[] simply stopped functioning.  Personally, I think the
> second method is better since it is atomic in nature.  It doesn't depend on
> any stateful settings.
>
> Has anyone else had this issue?
>
> Thanks,
>
> Paul McHale  |  Electrical Engineer, Energetic Systems   |  Excelitas
> Technologies Corp.
>
> Office: +1 937.865.3004   |  Fax: +1 937.865.5170
> 1100 Vanguard Boulevard, Miamisburg, OH  45342-0312
> Paul.McHale at Excelitas.com
> www.excelitas.com
>
>

• Follow-Ups:
  • Re: Comment about SetDirectory[]
    • From: W Craig Carter <ccarter@MIT.EDU>

• References:
  • Re: Comment about SetDirectory[]
    • From: "Alexey Popkov" <lehin.p@gmail.com>