Source Gas On and Off tasks are missing from the MassLynx Shutdown Editor, and startup fails at source gas on task - WKB25826

SYMPTOMS

• When MassLynx is first started, the Source Gas On (ESP) and Source Gas Off (ESP) options are missing from the Task drop-down list in the shutdown editor
• This is a problem if you start MassLynx and then run a batch startup that specifies the Source Gas On task in the method
• Unable to turn off API gas using shutdown method in MassLynx 
• Startup or shutdown fails with error message:
  "Shutdown unable to complete execution of <startup/shutdown method name>
  Failed to turn ESP source gas on"

MassLynx must be restarted to clear the error.

Examples of releases that show the problem: MassLynx SCN 714, SCN 805, SCN 810, SCN 843, SCN 997, SCN 986, and SCN 1040

ENVIRONMENT

• 3100
• ACQUITY TQD
• Quattro Premier
• Quattro micro
• SQ Detector
• SQ Detector 2
• SYNAPT G2-S
• Xevo G2-S QTof
• Xevo TQ Absolute
• Xevo TQ
• Xevo TQD
• Xevo TQ-S
• Xevo TQ-S cronos
• Xevo TQ-S micro
• Xevo TQ-XS

CAUSE

Software defect CRI-3822 

The error "Failed to turn ESP source gas on" happens because the Source Gas On task is missing from the drop-down list but present in the method.

FIX or WORKAROUND

Fix:
This is fixed in SCN 1043 and subsequent software releases for all quadrupole instruments listed in the release notes.

It is also fixed for SYNAPT G2-S and Xevo G2-S QTof.

Workaround:
The Source Gas On and Off options appear in the drop-down list if you do one of the following:

• Acquire a sample.

• Toggle the ion mode on the tune page before running the Startup.

Note: The problem returns if MassLynx is restarted.
 

ADDITIONAL INFORMATION