In the case of access to the companies and choose a company name and select the user name and password and you receive this message within the system user system already are not allowed to enter into more than one terminal
Van This shows that the program is open on one of the devices within the network, and it is not possible that the two machines working simultaneously in the name of one user in one company.
In this case, users must be created from within the program names, and determine the validity of each user