Cannot start Microsoft Outlook, The command line argument is not valid

If when using Microsoft Outlook on your Windows PC, y'all have a message – Cannot showtime Microsoft Outlook, The ascendance occupation declaration is non valid, Verify the switch y'all are using, thus hither are approximately possible solutions that may assist y'all cook your problem.

Cannot showtime Microsoft Outlook, The ascendance occupation declaration is non valid

1] Open Outlook Safe Mode & disable add-ins

Safe Mode of Outlook tin sack assist notice the problems y'all convey amongst your Microsoft Outlook. This procedure helps when y'all are facing the final result due to a corrupt add-in. To showtime Microsoft Outlook inwards Safe Mode, press Win+R to opened upwardly Run prompt as well as run this command:

Outlook /safe

It volition inquire y'all to select a profile that y'all desire to use. Select a profile from the drop-down carte du jour as well as click the OK button.

Once y'all convey successfully opened Microsoft Outlook inwards Safe mode, it volition showtime amongst add-ins disabled. This way that approximately add-in is creating the problem. You volition convey to position the bad add-in as well as disable or take it.

You volition hold upwardly able to enable/disable/remove them here: File > Options > Add-ins. Select COM Add-ins from the bottom drop-down menu, as well as click the Go button.

Once y'all convey done the needful, closed the Outlook window as well as drive to opened upwardly it normally.

2] Use Microsoft Outlook Inbox Repair Tool

The Outlook Inbox Repair Tool tin sack repair corrupt PST file thus that y'all tin sack opened upwardly Outlook without getting whatever error. To role this tool, navigate to this path:

C:\Program Files\Microsoft Office\root\Office16

Or,

C:\Program Files (x86)\Microsoft Office\root\Office16

Here y'all tin sack reveal an application called SCANPST.EXE. Double-click on it to opened upwardly the program.

Now, click the Browse button as well as select the backup file as well as click the Start push to showtime repairing.

3] Re-register Outlook files

You may re-register 2 virtually of import Outlook dll files as well as come across if it helps y'all cook the issue. Open Run prompt yesteryear pressing Win+R as well as execute these command:

regsvr32 OLE32.DLLregsvr32 INETCOMM.DLL

After that, drive to opened upwardly Microsoft Outlook on your computer.

4] Reinstall Outlook

If none of the solutions worked for you, the final pick is to repair or reinstall Microsoft Outlook. To repair Office programs, opened upwardly Control Panel > Uninstall a program.

Right-click on Office > Change. Choose your options to repair Office programs.

Hope something hither helps you.

Read next: Troubleshoot Microsoft Outlook problems similar freezing, corrupt PST, Profile, Add-in, etc

Source: https://www.thewindowsclub.com/

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