External File Comparison Parameters and Long Paths

hartmannr · Joined: 10 Oct 2006 Posts: 3

When using the "Long Paths" prefix the parameters passed to the External File Comparison program include the prefix (e.g. \\?\). This syntax is not expected by some or all comparison programs. There should be an option to strip the prefix (\\?\ or \\?\UNC\) when passing the parameter so the comparison will work properly.

TGRMN Software · Site Admin Joined: 10 Jan 2005 Posts: 8684

Hi, what external program are you using? thanks
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hartmannr · Joined: 10 Oct 2006 Posts: 3

I am using WinMerge: C:\Program Files (x86)\WinMerge\WinMergeU.exe
Parameters: "%s1" "%s2"

The resulting command line is:
"C:\Program Files (x86)\WinMerge\WinMergeU.exe" "\\?\D:\<folder>\<file>.txt" "\\?\UNC\<server>\<folder>\<file>.txt"

If the Long Paths prefixes are removed, it works:
"C:\Program Files (x86)\WinMerge\WinMergeU.exe" "D:\<folder>\<file>.txt" "\\<server>\<folder>\<file>.txt"