David.
> Best regards
> Petr
>
>
>> -----Original Message-----
>> From: Fox, John [mailto:jfox at mcmaster.ca]
>> Sent: Friday, August 19, 2016 3:15 PM
>> To: PIKAL Petr <petr.pikal at precheza.cz>
>> Cc: r-help at r-project.org
>> Subject: RE: file.create issue
>>
>> Dear Petr,
>>
>> This is a Windows OS issue, not peculiar to R. There are some reserved
>> names that can't be used for files, including COM1 (the first serial port).
>> Other examples include LPT1 and AUX. Because file names in windows are
>> case-insensitive "com1.txt" also causes problems.
>>
>> I hope this helps,
>> John
>>
>> -----------------------------
>> John Fox, Professor
>> McMaster University
>> Hamilton, Ontario
>> Canada L8S 4M4
>> Web: socserv.mcmaster.ca/jfox
>>
>>
>>
>>> -----Original Message-----
>>> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of PIKAL
>>> Petr
>>> Sent: August 19, 2016 9:00 AM
>>> To: r-help at r-project.org
>>> Subject: [R] file.create issue
>>>
>>> Hi
>>>
>>> Can anybody explain why one character makes such a difference?
>>>
>>>> file.create("com1.txt")
>>> [1] FALSE
>>> Warning message:
>>> In file.create("com1.txt") :
>>> cannot create file 'com1.txt', reason 'No such file or directory'
>>>> file.create("con1.txt")
>>> [1] TRUE
>>>>
>>>
>>> It took me quite effort to find out that "com1.txt" is not valid for naming a
>> file.
>>>
>>> BTW I am on Windows, if it matters.
>>>
>>> Best regards
>>> Petr
>>>
>
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