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Failed to open Excel document '(Excel launching error.)'.

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Posted on by HarshChauhan

Last Night It was working Fine, Today I haven't changed any settings and don't know why it not working.
Failed to open Excel document '(Excel launching error.)' . - Subflow: Main, Action: 1, Action name: Launch Excel

Details DetailsError Message:-
Microsoft.Flow.RPA.Desktop.Robin.SDK.ActionException: Failed to open Excel document '(Excel launching error.)' . ---> System.ArgumentNullException: Value cannot be null.
Parameter name: type
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.Activator.CreateInstance(Type type)
at Microsoft.Flow.RPA.Desktop.Modules.Excel.Actions.ExcelActions.LaunchExcel(Variant documentPath, Variant varPassword, Variant& excelInstance, Int32 launchMode, Boolean visible, Boolean loadAddInsAndMacros, Boolean needsAuthentication, Boolean readOnly)
--- End of inner exception stack trace ---
at Microsoft.Flow.RPA.Desktop.Modules.Excel.Actions.LaunchExcel.Execute(ActionContext context)
at Microsoft.Flow.RPA.Desktop.Robin.Engine.Execution.ActionRunner.Run(IActionStatement statement, Dictionary`2 inputArguments, Dictionary`2 outputArguments)

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Power Automate Desktop

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MichaelAnnis 5,727 Moderator on at

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Go to Task Manager, find any Excel, right click and End Task. Make sure they are all gone. Then try to rerun.

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HarshChauhan 52 on at

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I tried closing all excel tasks. Also, I restarted the laptop, Still Not Working.

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mgrachii 206 on at

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Do you have installed the most recent version of Power Automate for DEsktop?

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HarshChauhan 52 on at

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Checked Sir, It's Updated.

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HarshChauhan 52 on at

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Even I have reinstalled Power Automate and WPS software.

Do anyone, have any other suggestion?

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Verified answer

HarshChauhan 52 on at

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Finally, I got the Solution. This Works for me, I hope it works for you too.
🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆🎆
Step 1:- Use "Run Application" Action As shown in the Images below.
Solution for Excel Error In Power Automate Desktop

The Problem:- WPS Software was asking for Make it default setting for opening all office files and power automate was unable to handle it. so when the application opened I clicked on "Don't ask me again" and now its's working. Maybe your software is asking for any permission, or update. so check it ones. Hopefully, I have explained it well.

Don't forget to try other basic solutions like
1. Restart PC
2. Repairing Both Software(Office and Power Automate). Repair by offline and online Both.
3. Check if your PC OS and software are updated.
4. Try to "End Task" all excel processes in Task Manager before starting power automate.

Thank you everyone for helping me 😊.
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Edit On 1-July-2022
Reinstalling Software always works. Also, try to uninstall the software entirely because sometimes software keeps a few files(like cache, obsolete files, logs) on your PC.

Before uninstalling any software make sure to save your document files somewhere safe. You can also create a restore point in windows and Backup your files in external storage to be extra safe😊.

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HarshChauhan 52 on at

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Yes, pls.
It's always better to work with updated software than outdated.

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jhaskamp 6 on at

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For me this was due to the variable of the path being in a list so I had to set excel to open a file with name of %Excel_File_Path[0]%

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Sheridon 5 on at

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Been having the same issue since i updated PAD @HarshChauhan did restarting work, i have restarted multiple times and i use a "terminate process EXCEL" before and after opening excel but i still get an error

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Dion_tw 66 on at

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I got the exact same thing since i updated PAD yesterday. Very strange and frustrating..

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