Shipping errors - bad formula

["Lyn St George" <lyn@zolotek.com>]

Hallo all

I've got a strange problem which I can't figure out. Using MV 3.14-3
and perl 5.00404 on RH 4.2. Going through the purchase process,
it gets to the check out page and shows this on the page and in 
the error log:

Shipping mode 'surf_E': bad formula. Returning 0.No match found for mode 'surf_E', quantity '5',
  returning 0.

It then has a zero price for shipping, and fails to complete the order.

For some reason, the system is not creating a 
2ndDayAir.gdbm or NextDayAir.gdbm, though it is creating 
a Ground.gdbm (and various others). Running the same 
catalogue here on my local machine (MV 3.14-3, perl 5.00502, RH 5.2)
it also fails to create these .gdbm's, but succeeds on checkout. 
Also, running it on OS/2 (MV 3.14-3, perl 5.00553) it does create these 
2 .db's and succeeds on checkout. Running the 'simple' demo (and
other catalogues) on the problem machine (my ISP), these 2 .gdbm's 
are created and checkout succeeds.

I've re-installed both Minivend and the catalogue on the 
problem machine, but with no difference. The shipping files 
are totally unchanged from the 'simple' demo at present, so 
it's *only_the_products_file* that is different. This file has 
weights placed correctly - it works on 2 systems but not 
the third.

It's got me beaten - anyone have any ideas at all??

Cheers
Lyn