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Sumatra PDF Reader forum

Small, fast, free PDF, EPUB, MOBI, CHM, DJVU, CBR, CBZ reader for Windows

Sometimes after a delay the -reuse-instance option does not work

Normally when I call the reuse-instance option of sumatrapdf by the following the reususe-incstance option works well.

SumatraPDF -reuse-instance myfile.pdf

But when my computer is idle for some time (e.g., 15 minutes) and after this delay, I use the same command, sumatrapdf opens a new instance of sumatrapdf.

Any clue what causes this problem?
(I use the last version of sumatrapdf 3.1.2 on Windows 7.
oiseaudenuit on December 25, 2016
That should not happen.

How do you determine there are multiple instances of Sumatra?
Krzysztof Kowalczyk on December 25, 2016
Because a new physical sumatrapdf window is opened.
oiseaudenuit on December 26, 2016

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