Thanks for the tip regarding version 3.0 and 4.0. The complete trace DAVdroid write to SD-Card contains “VERSION:4.0”. Owncloud somehow falsly converts it to “VERSION:3.0” without converting the values properly. So this ticket can be closed. Thanks for your help.
P.S.: This is my oc workaround: https://github.com/s3menzer/contacts/commit/5e5a813f8eaff6a77dc2b2f9abb533a5f973a5db
415 when creating calendar
I have problems on my Huawei P8. Android is 6.0. When I try to create a calendar - hit CREATE - I have this error appears.
at.bitfire.dav4android.exeption.Http Exeption 415 Unsupported Media Type. I have tried all but noting. Pls advise.0_1501783268676_debug.txt
This is not a DAVdroid problem.
It seems like your server (which one?) doesn’t support extended
MKCOL. Please use your server’s Web interface / other administration facility to create calendars and just synchronize them with DAVdroid.
I used the WebDAV server of Synology. i Could find this kind of setting extended MKCOL