I have a very wearied problem , i made application on Ms access 2003 and i sent to many users to run and use it , all users have at least Ms Access 2013 and above , most of them the application worked smoothly without any problem , others they had error message " 2501 The Open Form action was canceled "
Note : some users have Windows 7 and others has Windows 10, Yes it worked on some of Windows 10 users.
I recompiled the application to 2007 Access and send it back to users which have problem using it, but still they had same error.
You'll need to provide more details do anyone to provide you with likely causes. For exsmple: What is the code that causes errors for those users? Are those users running runtime Access or 64-bit Access? Are there are missing references for those users?