Autostart macro failed error 999 in OpenLAB CDS ChemStation

Autostart Macro failed, error# 999 occurred (OpenLAB CDS Chemstation Rev. C.0x.0x)

This is usually resolved by resetting the instrument configuration files in the instrument folder (\Chem32\x\, where x is the number of the instrument in question).

Append .old to these files with all sessions (online and offline) of ChemStation turned off:

config.reg

ChemStationPerInstrumentSettings.config

instrument.config

RapidControl.InstrumentConfig.xml

After modification, the files will read:

config.reg.OLD

ChemStationPerInstrumentSettings.config.OLD

instrument.config.OLD

RapidControl.InstrumentConfig.xml.OLD

Start ChemStation again and the problem should be resolved.