Did anyone see the warning (Personal.XLSB is Locked for Editing) when an application tries to launch an excel document after a different excel document is open manually?
The files are coming from my own machine. It is ok (no warning) if I launch an excel document manually after a different excel document is open manually.
It is also ok (no warning) if an application launches an excel document after another application or the same application launches a different excel document.
PS
Windows 10 Enterprise
Microsoft 365 Apps for enterprise
No password for any excel documents for testing
.NET 5 VB project
Dim filePath As String = "C:\Users\Zhen.Z\test-epplus.xlsx"
Dim psi As ProcessStartInfo = New ProcessStartInfo(filePath) With {.UseShellExecute = True}
Process.Start(psi)


