I have an application which is hosted on a FileMaker Server 14 host run by a third-party hosting company. My clients access the application using both Windows and Mac machines, with the Filemaker Client software. In the application I use SendMail to activate the local mail client software on the user machine. Those users who have a Mac have no problems but those users with Windows machines, running Windows 10, get an error message which says -
The action cannot be completed because the other program is busy. Choose 'Switch To' to activate the busy program and correct the problem."
The only way to move forward from this point is to kill the Filemaker Client on the local machine. The error appears on both Windows local machines and Windows Virtual machines running Windows 10 but not on Mac machines.
Some information -
Filemaker Pro 15 Advanced (Version 18.104.22.168)
Filemaker Server 14 (Hosted with FMP Host)
I hope someone can assist.