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:
After modification, the files will read:
Start ChemStation again and the problem should be resolved.