UP-5300 (serv.man6). Frequently asked questions (Aug 2002) - Sharp EPOS FAQ (repair manual). Page 17

Read Sharp UP-5300 (serv.man6) FAQ online

I am getting the following
error when paying by Credit
card using comidea on the
5700 / 5300.
“-90 Error”
Check that the POS
has a mapped drive to
the backoffice pc.
This can be done by
creating the following
file NETL.BAT in the
C:\USR\EX directory
as shown below.
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