I am having an issue with using the 'oaxaca' package in STATA. I have managed to use this package in the past but today I an unable to install it due to the following error:

file c:\ado\plus\next.trk already exists
r(602);

which states that the package is already installed. When I try to use the command, I get the error message:


command oaxaca is unrecognized
r(199);


However, when I use command 'ado' the oaxaca package does not show to be installed, and subsequently I am unable to uninstall the package due to this error message:

package not found
r(111);


Please can anyone help!