Win: Protected View causes file to close and reopen

[fzumstein]

When the samples are downloaded from the internet and depending on the Excel setting under File > Options > Trust Center > Trust Center Settings..., Excel can give you a Security Warning - Enable Content. If that is the case, the excecution of the macro will end with hiding the Workbook completely. In that case, only a restart of Excel helps. A workaround is to close/reopen the Workbook just after enabling the Security Warning.

[fzumstein]

In the meantime (v0.3.0) this behavior has slightly changed in that the file closes and reopens automatically. If the file is small enough, this is almost not noticeable, but when the file is larger (or the computer slower), this can easily be observed. It also happens under other circumstances, most probably some conflict with add-ins, see: http://stackoverflow.com/questions/27802340/is-there-a-way-to-call-python-with-xlwings-without-reopening-the-excel-file