RBowers@nyiso.com writes to the NYISO_TECH_EXCHANGE Discussion List:  This notice is to inform Transmission Customers that the September 20, 2001 OATT Schedule 1 residual adjustments are artificially inflated in the first version of the advisory billing statements.
A file used in the computation of subzonal loads was not loaded prior to the billing run making it appear as though no load existed in some subzones.
This  causes all DAM scheduled purchases and bilateral transactions serving load in the affected subzones to be sold back in the Balancing Market.
This creates an under-collection which is then recovered from the market through the balancing energy, losses, & congestion residuals .
The 20th will be rerun as soon as price corrections and metered MWh values have been reconciled.
The NYISO apologizes for any inconvenience caused by this problem.
Regards,

September 20, 2001 Residuals
<EMAIL> writes to the NYISO_TECH_EXCHANGE Discussion List: This notice is to inform Transmission Customers that the September <NUMBER>, <NUMBER> OATT Schedule <NUMBER> residual adjustments are artificially inflated in the first version of the advisory billing statements.
A file used in the computation of subzonal loads was not loaded prior to the billing run making it appear as though no load existed in some subzones.
This causes all DAM scheduled purchases and bilateral transactions serving load in the affected subzones to be sold back in the Balancing Market.
This creates an under-collection which is then recovered from the market through the balancing energy, losses, & congestion residuals .
The 00th will be rerun as soon as price corrections and metered MWh values have been reconciled.
The NYISO apologizes for any inconvenience caused by this problem.
Regards,
causes dam scheduled affected metered mwh values nyiso_tech_exchange discussion subzonal loads loaded losses congestion billing statements file creates collection recovered residual adjustments artificially september