the batch file contains:
start "" "C:\Program Files\TrueCrypt\TrueCrypt.exe"
and i can execute that batch successful if this batch is located an drive c:.
When i copy that batch file to drive d: i always get the error message (in the dosbox): "Zugriff verweigert" (en: "access denied"). Even if i run the batch as administrator.
User Account Controll (UAC) (de: "Benutzerkontensteuerung") is disabled.
How to run it from drive d successful?
After some research: The installed personal filewall (COMODO Firewall) has a feature called Defense+ which checks local batch executions. Removing the batch from "trusted files" and removeing from "own security rules" brings the popup back to re-decide what is allowed and what is not allowed.
Issue fixed.