network disc mapping

[Lost User]

calling net use * \\computer\disc /user:user /persistent:no it from undfined time/reason for some computers displays System error 1219 has occurred. The credentials supplied conflict with an existing set of credentials. untill i not reboot i'm not able to map this disc what is reason? what to do against? thanks

[Mike Dunn]

That means you're already logged in to \\computer as a different user.