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Program Gives an Error When Starting or When Trying to Enter the Laboratory

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Program Gives an Error When Starting or When Trying to Enter the Laboratory

When first entering the laboratory either through the door, card reader, or through the workbook, the program checks to make sure the current user (even if it is a Guest or Workbook user) has permission to enter the laboratory. Some checks are also made when the program first begins. If the user does not have the proper file permissions, then those checks fail and the user is either prevented from entering the lab or several kinds of errors are reported. If any type of error is reported, the most likely cause is that the current user does not have the proper file permissions for either the installation folder or for the database.

v2.5 or Earlier Users. For v2.5 or earlier users of of Virtual ChemLab, the user must have read/write permissions for the directory or folder where the program was installed. The user does not have to have access to that folder, but the user does have to have full read/write permissions. In this earlier version of the software, temporary files are written in the installation folder. v3.0 or later versions should not have this problem.

Server Database.  For those users who are accessing a common database installed on a server (Direct Database Access), again the user must have complete read/write access to the folder where the database has been installed on the server. The user does not have to have access to the folder, but just read/write privileges. Another common problem that will cause these errors is when the correct path to the database was NOT supplied at the time of installation. In other words, the program doesn't know where to find the database.

Summary. If you get errors when any of the virtual labs are started or when trying to access the laboratory, the most common problem is insufficient file permissions for the current user. Another common cause is an incorrect path do a server based database.

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