I'm having a bugger of an odd problem relating to a class I've written to handle tracking open tables and restoring them automatically.

The object is typically created ias a LOCAL var, and its Destroy() method is used to clean up after itself whenever it goes away.

It's been working fine, but recently, some testing has revealed a bizarre problem caused somewhere in its guts.

It's a hell of a problem because the symptoms are divorced from the cause (as far as I can tell). I have no idea what the cause is (although I suspect it has something to do with some kind of memory problems -- leak, bad pointer, etc.). The symptoms arre:

* I get a Data Type Mismatch error in a RETURN statement such as "RETURN lnCosts", where costs is a numeric.

FOLLOW-UP: the value of lnCosts is in some way hammered, because if I try to print its value with the ? command, I get an Internal Consistency Error and VFP bombs out. The same thing happens if I try to view the var in the debugger's Watch window. However, if I set "X = lnCosts", I can print and return X without a problem.

* I get certain variables being redefined. For example, I have a LOCAL variable y, and when I call a certain subroutine (without passing in y or any variable bound to y), y is reset during the declaration of variables in the sub.

FOLLOW-UP: If I change a LOCAL definition to a PRIVATE one in the sub, WHICH variable in the calling context gets rest it changed. Also, if I make the sub's declaration PUBLIC, no problem ocurss. NOTE: there is no name sharing going on in these subs (i.e., y is never used as a different var in the sub).

* I get an "ILLEGAL REDEFINITION" error on the first line of a function "LOCAL loObject". That would seem to be an impossible error given that it's the first line of the function.


The problem with these issues is that I can investigate themto some extent, but I have no idea what specifically could be causing them to occur, so I really have little sense of where to start looking.

Any leads appreciated.

-- jas