The following steps describe best practices for configuring Scan Acquisition Server settings in a Citrix environment.
- Open the EpicIntegrations.config file from the directory containing the Scan Acquisition Server files.
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Under <Diskgroup>, configure the Path setting using one of the following formats:
Option
Format
Home Directory
<drive letter>:\<folder path>
For example, enter U:\SAS, where U:\ is mapped to the user's home directory.
Local Disk
<drive letter>:\<folder path>\%username%
For example, enter C:\SAS\%username%, where C:\ is the Citrix server's local disk drive.
Network Share
<network share>\%username%
For example, enter \\server\SAS\%username%.
Note:The Path is the location where scan formats and temporary files are stored during scanning. The Path location must be unique to each scanning user. Using the %username% variable is recommended to ensure the path is unique.
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Determine whether one set or multiple sets of scan formats will be used.
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If only one set of scan formats will be used for all users, specify the network share for storing scan formats in the ConfigPath setting, which is also located under <Diskgroup>.
The ConfigPath can include the %username % variable to represent the Windows user name of the current user (for example, \\server\SAS\%username%). This configuration may be necessary for solutions where a single set of scan formats is being distributed to user-specific locations.
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If multiple sets of scan formats will be used to accommodate different locations or scanner types, then do not specify a ConfigPath value. When no ConfigPath is specified, the Scan Acquisition Server will check the configured Path for scan formats.
This configuration requires a Citrix logon script to copy the scan formats from a network share to each user's Path directory, as described under Configuring the Citrix Server.
Note:If a ConfigPath location is provided, the Scan Acquisition Server disables the options to add, modify, and delete scan formats. To lock down access to global scan formats, also ensure users do not have Modify or Write permissions to the network share.
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Under <Scan>, set the LowTwainMode setting to 1.
Low TWAIN mode addresses a number of TWAIN scanning issues both within and outside of Citrix, particularly those that deal with scanner settings.
- Save EpicIntegrations.config.
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Open the Registry Editor.
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On a 32-bit system, open the regedt32.exe from C:\Windows\system32.
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On a 64-bit system, open the regedt32.exe from C:\Windows\SysWow64.
CAUTION:Modify the registry at your own risk. Incorrectly editing the Windows registry can cause serious problems that may require you to reinstall your operating system. Be sure to back up the registry before making any changes to it.
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Set the Scanner string value to Generic Scanner in the following subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\ACEpicScanControl\Twain
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Generic Scanner allows the Scan Acquisition Server to use existing scan format configuration files for any compatible TWAIN driver, so new scan formats won't need to be configured for each model of scanner.
Note:Before being used in production, all scanners and scan drivers should be tested to ensure that they can use the available scan format configuration files (configured in the next procedure). Incompatible scanners and drivers cannot use the scanner settings specified in the scan format configuration files.
- Remove the write permission to the TWAIN registry subkey for scanner users. This step ensures that the Scanner string value you configured in the previous step will not be overridden when users establish Citrix connections with different scanners.