How to manually trigger an Automated flow where - When a file is created (SharePoint) - is the only trigger

[YatinMumbai]

I have a Flow that has a trigger "When a file is created" (SharePoint). Some times the flow fails to run due to missing mandatory properties/columns in the SharePoint document library. How to manually trigger the flow? Since I do not have "modified" in trigger, I cannot update some SharePoint column for flow to run. 

Background: I have an Excel template where certain cells are linked as custom properties. These cell values are updated in SharePoint columns on upload. Sometimes, when a user fills the tempalte and uploads the file, these values are not updated in SharePoint columns. Unfortunately, SharePoint will allow the file upload but mark it as "Files that need attention". I wish such files are rejected if mandatory columns are not populated.  

[Expiscornovus · Accepted solution]

Hi @YatinMumbai,

When it is not triggered you won't have a flow instance to resubmit.

I would use the following approach:

copy/save the flow as a new flow. Replace the when a file is created trigger action by a for a selected file trigger action.

Use that copy of the flow  to manually trigger the files which don't get triggered by the original flow.

[YatinMumbai]

I tried this but it has not worked. My subsequent actions have references to file properties / columns. After For a selected file trigger I have also added Get file properties action with ID from the previous action. But those subsequent actions are showing errors.