Why does 7-zip.exe return "Access is denied" with these arguments/parameters?

Question

In a batch file:

START "7-zip" /D "C:\Program Files\7-Zip\" "7z.exe" a -o <F:> testArchive F:\test

Or, alone on the cmd as:

7z.exe a -o <C:\users\user\Desktop> testArc C:users\user\desktop\test

returns "Access is denied". I would expect it to run 7-zip with the specified parameters. Why doesn't it?

Here is the code for the batch file:

@echo off 
:Variables 
set SOURCE=F:\myDocuments\ 
set DESTINATION=E:\myDocuments\ 
:If disc space is available, make tar ball or .7z or whatever of /myDocuments and place it in F:/Backups 
START "7-zip" /D "C:\Program Files\7-Zip\" "7z.exe" a -o <F:> testArchive F:\test 
pause 
:echo %SOURCE% 
:echo %DESTINATION% 
:pause 
:run create sync. on documents to H:/myDocuments 
:Otherwise, say there's not enough disc space

This doesn't happen if proper syntax is followed for the z-zip command. Access is Denied was due to a 7zip syntax error.

Answer 1

Check the permissions of the 7za.exe program itself; Right click -> Properties -> Security -> (choose a user)

And check that Read & Execute is ticked. On my machine, I had Read access but not Execute.

Answer 2

I got the same issue randomly. When I add the first file it works fine, but trying to add a new file, then got the "Access denied" message.

I solved it by defining the temp directory (work directory) to 7z. Like:

7z a -w"C:\1" "C:\1\zip_file.zip" "C:\1\file_to_zip.txt"

Now it will use the work directory as "C:\1" and works fine for me.

Answer 3

I solved the problem by reinstalling 7-Zip in a drive other than system drive

Answer 4

i found that changing the permissions to add "Write" solved my issue. but that leaves me with the question as to WHY NOW?. i have never had this issue before. i had to reset my win 10 due to performance issues. and as such i had to reinstall many applications. 7zip being one of em. never before have i encountered this problem. and i am unsure as to why it happened now.