windows - WIX: The product is not uninstalled fully (the files from system is not removed) -

i have problem when uninstalling app not removing files. find out there when app uninstalling in log prints:

... msi (s) (0c:84) [11:39:07:836]: disallowing uninstallation of component: {51db6066-afcd-5a03-be34-09e197799057} since client exists ...

then find out using wix toolset has api called dtf (mentioned in wix toolset: complete cleanup after "disallowing uninstallation of component since client exists"), , executed query in linqpad (c# statement):

(f4 press import namespaces , additiona reference)

//using microsoft.deployment.windowsinstaller; //using system.linq; // <ref>"c:\program files (x86)\wix toolset v3.9\sdk\          microsoft.deployment.windowsinstaller.dll"</ref>    var client = componentinstallation.allcomponents     .where (c => c.componentcode == "{72ed6979-0aad-317c-a25c-ab9a121e6d30}")     .select(c => c); client.dump(); 

that there old recods:

i cant remove them using "msiexec /x {guid}" becouse these products marked "isinstalled=false".

so how remove these old records?

disallowing uninstallation of component: {51db6066-afcd-5a03-be34-09e197799057} since client exists

this means there 1 or more products installed on system reference component.

have made sure there no other product on system references component?

you dont want sort of clean-up windows installer handles of without sort of user intervention.

have installed older version of product earlier or file installed merge module?