Cygwin Problems

Executables Do Not Run

I have observered a problem in a migration I have just done where executables such as ssh.exe, sshd.exe and svn.exe do not run but simply exit with no output when you attempt to run them.

In a previous installation I ran into this problem (but just with svn). In that case, I identified a missing DLL, C:/cygwin/bin/cygz.dll.

Copying this DLL (cygz.dll) off another cygwin installation seems to work OK.

Not sure why it is missing?

Was able to diagnose the problem using MS System Internals tool FileMon - as follows:

9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\cygwin\bin\cygz.dll                  NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\WINDOWS\system32\cygz.dll            NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\WINDOWS\system\cygz.dll              NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\WINDOWS\cygz.dll                     NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\WINDOWS\system32\cygz.dll            NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\cygwin\usr\local\bin\cygz.dll        NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\cygwin\bin\cygz.dll                  NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\cygwin\bin\cygz.dll                  NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\cygwin\usr\X11R6\bin\cygz.dll        NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\WINDOWS\system32\cygz.dll            NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\WINDOWS\cygz.dll                     NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\WINDOWS\System32\Wbem\cygz.dll       NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\Program Files\1E\SMSNomad\cygz.dll   NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\ORACLE\1020\bin\cygz.dll             NOT FOUND Attributes: Error 
9:40:16 AM     svn.exe:3320   QUERY INFORMATION   C:\cygwin\lib\lapack\cygz.dll           NOT FOUND Attributes: Error 

See Microsoft Systems Internals Tools