string not recognized in command line

[TNH]

Thanks for your help.
I tried this

str check.format("C:\7-Zip\7zg.exe a C:\Users\123\Downloads\test.7z %s" ft)
out check
out F"C:\7-Zip\7zg.exe a C:\Users\123\Downloads\test.7z {ft}"
 possible ways to run uncomment to test
RunConsole2 check
RunConsole2 F"C:\7-Zip\7zg.exe a C:\Users\123\Downloads\test.7z {ft}"

I works with one file.
When i select a couple files it only zip the last one.

I am posting the screenshot of the output.

Any suggestion?