Hi,

I found the solution.

When using AUTOFETCHALL = FALSE then IBO only fetches a few records
at once. If you then commit the transaction manually, IBO opens it
again because the requested task has nod been finished yet.

The automatic commit doesnot fire, because the transaction is still
active. So I set AUTOFETCHALL = TRUE to be sure the autocommit fires
every 120 seconds. That way OAT and "Next free transaction" (NFT ?)
number stay very close to eachother at all times.

Leon