/* EConvertError: '''' is not a valid date and time Sessionpath: Valuename: 73 Raw: */

What does that mean ?

I mean, obviously it is something 'wrong' with date field.
There is no null values, checked.
Error does not appear on all rows, just on some of them
Presumably all values are ok, as db accepted them.

BTW,row count on lower window, where these messages pops out, like
/* EConvertError: '''' is not a valid date and time Sessionpath: Valuename: 73 Raw: */

A text line counter, for that window, would be sometimes useful.

Forget upper BTW (-: But clicking 'clear', on that window should realy reset row count, now it does not.

See issue #2960, and please update your build.

Is download of latest bulid exe no more available.
Can't find that.

ok foundd it. http://www.heidisql.com/download.php
I don't know where I was, on some page with side bar, downloads there and only setup, 3 options only. No exe separately.