You should inspect your PATH variable and insure that only 1 copy of each Cadence item in the PATH. Note there will be several Cadence entries such as tools\bin, tools\fet\bin, etc. It is best if they come first in the PATH. Also from a mgmt perspective it is best to group them all together.
So if you see one "%CDSROOT%\tools\bin"and another "C:\cds\tools\bin" you are going to have problems.
There is a limit to the PATH variable but it should be 1024 characters.
It is best to maintain the %CDSROOT% variable since it gives you the ability to switch amoung Cadence releases.
Also you have 2 locations that PATH can occur, System and User. The Cadence items should all come from one location.
Since it is hard to see the PATH all of the entities in a long PATH, I would suggest the following:
- start a cmd.exe
- in the console window type: echo %PATH% > a.txt
- inspect the PATH shown in a.txt via your favorite editor. (note these paths are expanded).