Salesbasket : the record has never been selected

So now and then we have a problem on our EP. The message is in dutch, but translated to english it would be : a record in salesbasket cannot be modified. the records has never been selected. This is when I try to acces the salesbasket or when we try to add an artikel. Also I have seen that after some time the website doesn’t react anymore (http 500 error) and I have to login again to work on the EP. Does anybode know what the problem is. (We suspect that the reason could be the fact that the login is used more than once at the same time …something with cache files ???) Also I would like to know if it’s possible to exclude the message ‘the data cache has been flushed …’ from the event viewer. This message is really irritating …

By now we have probably found the solution. It looks like NOT using bmmsa as the SQL (logon) account seems to be to problem. After we changed it and using this account (which is mapped to dbo) we didn’t get this message anymore. Greeting Jurgen