In newer Therion releases (previously using 6.1.8 version) something has
been changed for sql creation:
column "nan" is produced when a survey doesn´t contain any centerline
with (underground) lenght. So if there are only surface legs, an error
importing sql file will occur based on line:

insert into MAPS values (110, 32, 'velky_previs_elem', NULL, 3, 0.000,
nan);

Adding underground leg 1  1_  0.00  0  0  to centerline changes result
as following:

insert into MAPS values (110, 32, 'velky_previs_elem', NULL, 3, 0.000,
0.000);


I really don´t know how things work in these exports, hope this will
help to improve things. Or maybe I am missing something.

Pavel



Dňa 2025-03-31 12:20 Pavel Herich napísal(a):
> Hi all,
>
> recently, when I try to import an sql Therion export in DB browser, an
> error message apears (in attachment):
>
> Error importing data: Error in statement #67789: no such column: nan.
> Aborting execution.
>
> Any idea what might be the problem? Especially how to find it in source
> Therion data...
>
> Thank you
> Pavel
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