>Hello Cetin !
>
>I found the solution myself !
>Immediately after connecting with sqlstringconnect at the beginning of my application i did
> =SQLSETPROP(connectnr,"Transactions",2)
>and now the unwanted "autocommit" behavior of the exe is stopped.
>
>Nevertheless thank you for your hints
>Best regards
>Albert

Oh my, you didn't set it to manual! Then be carefull about the bug (IOW I suggest not to use manual and explcitly use 'begin/commit/rollback tran').
Cetin