Denis,

the c000..5 are the hardest to find. Can you provide more detail on the instructions executing in the stack ?

I am not mad. But soon shall be !

>Gregory - there are open tables but these all seem OK. Thanks again. I'll keep looking, Denis (going slowly mad ...)
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>Another shot. Are there any tables open that you are accessing ? The cause may be an corrupt index file. Reindexing all tables may help