if a new woas 0.12.0 wiki is taken and under special::Options the optoin Use multiple files in WSIF datasource is checked and a filename is given, woas creates several swif files, if the first time some content is added. If woas is closed and reopend the following error is shown.
WoaS Unhandled Error
Could not load WSIF pages data!
Import error for page WoaS::ImportSettings after import!
WSIF ERROR: Import error for page WoaS::ImportSettings after import! Before are additonally some import failures, where some attributes are not defined for the page.
This is how it can be reproduced with different browsers and operating systems, I guess it's a failure in the sourcecode. By the way, the option "Lock WSIF datasource when editing" seems also not working, because not locking file is created, when content is added and all the wsif files are created.