On Mon, Aug 22, 2016 at 4:31 PM, dan moylan <j...@moylan.us> wrote:

> > Can't call method "prepare" on an undefined value at
> > /home/moylan/ulmmoy/prl/sub/USR/USR.pm line 777.

​The problem occurs several possibly many lines earlier.
Wherever $dh0 is initialized, it should be checked for
   ! defined $dh0​
​and if so, the error text from the failed statement should be logged and
the world stopped.

I'm glad to see ​you're using prepared statements ... because no one wants
to play with Bobby Tables

bobby-tables.com: A guide to preventing SQL injection
> Who is Bobby Tables? From the webcomic xkcd.
> School: Hi, this is your son's school. We're having some computer trouble.
> Mom: Oh, dear -- Did he break something?

Bill Ricker
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