Can't append line from unnamed buffer to file opened

[av]

Hi,

Does somebody know why I cannot append a line from a unnamed buffer (current buffer) to a file that is opened in another buffer? I get the message that the file is opened in another buffer, even if I add the !

Thanks,

Alexandre

[Christian Brabandt]

Please give exact reproduction steps.

Christian
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*Optische Täuschungen II*

Welches Dreieck ist am dreieckigsten?

a) ein Dreieck c) ein Dreieck mit den Winkeln 60-55-65=180
b) ein anderes Dreieck d) ein Dreieck mit den Maßen 90-60-90

[alexandre viau]

:edit f1.txt

:new

write some text on current line

:.w! >> f1.txt

Then there is the error message "E139: File is loaded in another buffer"

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[alexandre viau]

Workaround (not found by me): 

.w !cat >> f1.txt