>>>>>>>> SAS Notes -- Copyright (c) 1991 - 2000 by SAS Institute Inc. <<<<<<<<
V6-FMS-G726 *** ALERT NOTE *** PRODUCT: ETS
TITLE: Model Refit fails for Forecast Combination models
KEYS: MODEL REFIT FAILS FORECAST COMBINATION INCORROUT INCORRSTAT TIME SERIES
COMBINE EXISTING FORECASTING MENU FMS TSFS SYSTEM
The Refit Model action and the Refit Existing Model action in the Time
Series Forecasting System will not correctly refit a Forecast
Combination model of multiple underlying models if the underlying models
have been refit to modified data. As a consequence, forecasts and
statistics of fit for the forecast combination model will be incorrect.
To circumvent the problem, use the Edit Model action for the combination
model instead of the Refit Model action. This will bring up the
Forecast Combination Model Specification dialogue. In this dialogue,
verify that the Forecast Combination is correct and click OK. The
Forecast Combination model will now be refit correctly to the underlying
models which had been refit to modified data.
+------REPORTED------+ +---FIXED---+
SYSTEM RELEASE LEVEL RELEASE LEVEL
AIX/R 6.11 TS020
HP800 6.11 TS020
IABI 6.11 TS040
MIPS ABI 6.11 TS040
OSF/AXP 6.11 TS040
OS/2 6.11 TS020
Solaris 6.11 TS020
Windows 6.11 TS020
WIN/NT 6.11 TS040
Win95 6.11 TS040
AIX/R 6.12 TS020
DigitUnx 6.12 TS040
HP800 6.12 TS020
Macintosh 6.12 TS040
OS/2 6.12 TS020
Solaris 6.12 TS020
VMS/AXP 6.12 TS020
Windows 6.12 TS020
WIN/NT 6.12 TS020
Win95 6.12 TS020
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