>>>

>>>SET EXCLUSIVE ON
>>>* or
>>>USE test EXCLUSIVE
>>>

>>
>>Strange - but that's it
>>
>>If I open 'exclusive' no error
>>
>>
>>Agnes: The workaround is to open exclusively - but I don't like that
>
>It's not a workaround but explanation why it works for some people but not for others.


I understand the whole construct now - why it didn't error on a cursor - which is exclusive

If not exclusive, it tries to lock the header, append and fill the default values. If any error has occurred in that sequence, it thinks it was not possible to lock the header