Robert Jan van der Waals

You have multiple options :-) If this is essentially the same book, you can use editions; you then have one book with 2 editions for example. Simply right-click the current item and choose "Copy Book & Assign as Edition". But I suspect this is not the case for you; If this is another book entirely, change the field setting so that a combination of fields make the book unique. Settings > General Field Settings ---> tick the "Key" checkbox for one or more additional fields beside the currently selected...

Sorry to hear about your issue. So I assume you have Data Crow installed without a username and password? And you then opened the Synchronization Service? What was the error message you got when you initially connected? There might be a clue, hopefully, in the Data Crow log (CTRL-L). Anyway, when you retry open the app, do you have the synchronization service open and started? I think it failed to connect and it is now actively retrying but it has gone into a bit of a loop. If you can get it to go...

It is very likely due to the port not being available or security software blocking the communication. Can you try a different port, 80 or 8080?

It's a bit of a head scratcher to be honest. It does look Data Crow tries to do what has to do but the database is not liking the queries in order to achieve this. Did you upgrade an older version of Data Crow? And if so, from which version did you upgrade? Don't think your database is corrupt, I think Data Crow is stumbling over something. I'd like to get to the bottom of this. I can understand if you don;t want to share your database. But could you perhaps zip the user folder contents of Data Crow...

Depends; if you have a recent backup I would use that. If your backup is really old, it might worth the hassle trying to resolve the database issue. Happy to try and help if you want me to. Or else you'll have to follow the procedures from the HSQLDB website (the database is from HSQL); https://www.hsqldb.org/doc/1.8/guide/apc.html Also would be good to know what the log says on the database when you start Data Crow.

As you might have seen I did release the Android version, as an APK. That means, outside of the Google Play Store. That is fine for some but not for everybody; it feels less secure and you need to manually update the app. I want users to have the option to download the app from the Google Play Store (I will also still release the APK). It's a simple matter of releasing it..... you'd think. After all, it is already in the App Store for Apple devices. Nope, I need to have a test period of 2 weeks with...

Data Crow Reader App now also on iOS

Data Crow 5.1.4 has been released