Application not starting

Hi,
the SharePoint Forms application updated this morning and then tried to load but I got this:

Details:
ERROR SUMMARY
Below is a summary of the errors, details of these errors are listed later in the log.
* Activation of C:\Users\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\Plumsail Forms 3.appref-ms| resulted in exception. Following failure messages were detected:
+ The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020)

COMPONENT STORE TRANSACTION FAILURE SUMMARY
No transaction error was detected.

WARNINGS
There were no warnings during this operation.

OPERATION PROGRESS STATUS
* [18/03/2025 08:48:41] : Activation of C:\Users\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\Plumsail Forms 3.appref-ms| has started.
* [18/03/2025 08:48:41] : Performing necessary update check as specified by the deployment.
* [18/03/2025 08:48:51] : Performing necessary update check as specified by the deployment.

ERROR DETAILS
Following errors were detected during this operation.
* [18/03/2025 08:48:51] System.IO.FileLoadException
- The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020)
- Source: mscorlib
- Stack trace:
at System.Deployment.Internal.Isolation.IsolationInterop.CreateActContext(CreateActContextParameters& Params)
at System.Deployment.Internal.Isolation.IsolationInterop.CreateActContext(IDefinitionAppId AppId)
at System.ActivationContext.CreateFromName(ApplicationIdentity applicationIdentity)
at System.Deployment.Application.ApplicationActivator.Activate(DefinitionAppId appId, AssemblyManifest appManifest, String activationParameter, Boolean useActivationParameter)
at System.Deployment.Application.ApplicationActivator.ProcessOrFollowShortcut(String shortcutFile, String& errorPageUrl, TempFile& deployFile)
at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String& errorPageUrl, Uri& deploymentUri)
at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivationWithRetry(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String& errorPageUrl)
at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state)

Dear @peter.harrison,
Unfortunately, that's a common ClickOnce application issue, just need to clear ClickOnce cache by deleting a few folders, here - Troubleshooting Plumsail Forms for SharePoint Online in Microsoft 365 — Plumsail SharePoint Forms Documentation

1 Like

Thank you Nikita.
That worked.
Fantastic support, always!