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.