It's not clear to me from the above whether you have solved your problem or not?

The basic gist of the problem (from reading the error message you posted), is that your code created a db handle in one thread and then attempted to use from another.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
The "good enough" maybe good enough for the now, and perfection maybe unobtainable, but that should not preclude us from striving for perfection, when time, circumstance or desire allow.

In reply to Re^3: mysqlPP has no driver CLONE() function so is unsafe threaded by BrowserUk
in thread mysqlPP has no driver CLONE() function so is unsafe threaded by Ace128

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