> Hi,
>
> After a day's worth of debugging, I've come to the conclusion that this
> is likely a FB bug. If so, let me know where to post it, and I'll stick
> it in its proper place to one day be fixed. Here's the issue:
>
> Initially, we had a function called GetOccurenceDate. Note that
> Occurrence is misspelt. The function declaration was as follows:
>
> DECLARE EXTERNAL FUNCTION GET_OCCURRENCE_DATE
> Date, Integer, Integer
> RETURNS Date BY VALUE
> ENTRY_POINT 'GetOccurenceDate'
> MODULE_NAME 'DmxUDF.dll';
>
> So one would think that fixing this is a no-brainer and just add the
> miss "r". But this causes this function to essentially go into some
> weird limbo-land.
>
> when I change it, so it reads:
> ENTRY_POINT 'GetOccurrenceDate'

what do you mean by "change it"
I assume you actually DROP it and recreate it?
Alan

> and with the appropriate changes to the DLL of course, the new
> GetOccurrenceDate function in the DLL is never called. A break point
> and various OutputDebug confirm this. But if GetOccurrenceDate is
> removed from the DLL entirely, FB complains with a BLR error as you
> would expect.
>
> FWIW, I test our function by calling it as follows:
>
> SELECT GET_OCCURRENCE_DATE(Cast('31.12.2010' as Date), 1, 3)
> FROM RDB$DATABASE
>
> If the function is actually working, this will produce a date of 2 Feb
> 2011. If it fails, it returns a date back int he 1800s, usually around
> 1858 but not always.
>
> What is so strange, is that it seems to think the function is valid,
> but it doesn't call it, which explains the dates back from the wild
> wild west!
>
> My guess is that this problem has something to do with BLR not being
> properly recompiled. The very strange thing is - if I rebuild the DB
> from our initial install script - i can still make it fail.
>
> So I've decided that this typo is a "feature" and reverted back the
> code, so the Entry Point refer to GetOccurenceDate rather then
> GetOccurrenceDate and all works fine again.
>
> Now, which FB God would like to know of this bug?
>
> cheers,
> -randall sell